diff --git a/desktop/app/src/sandy-chrome/DesignComponentDemos.tsx b/desktop/app/src/sandy-chrome/DesignComponentDemos.tsx
index 4cff33a45..36ca9a968 100644
--- a/desktop/app/src/sandy-chrome/DesignComponentDemos.tsx
+++ b/desktop/app/src/sandy-chrome/DesignComponentDemos.tsx
@@ -103,10 +103,10 @@ const demos: PreviewProps[] = [
             background: theme.successColor,
           }}></Layout.Container>
       ),
-      'bordered padded rounded': (
+      'bordered pad rounded': (
         <Layout.Container
           bordered
-          padded
+          pad
           rounded
           style={{background: theme.backgroundDefault, width: 200}}>
           <div style={demoStyle.square}>child</div>
@@ -152,8 +152,8 @@ const demos: PreviewProps[] = [
           {aDynamicBox}
         </Layout.Horizontal>
       ),
-      'Using flags: padded center gap={8} (great for toolbars and such)': (
-        <Layout.Horizontal padded center gap={8}>
+      'Using flags: pad center gap={8} (great for toolbars and such)': (
+        <Layout.Horizontal pad center gap={8}>
           {aButton}
           {someText}
           {aBox}
@@ -187,8 +187,8 @@ const demos: PreviewProps[] = [
           {aDynamicBox}
         </Layout.Vertical>
       ),
-      'Using flags: padded center gap={8} (great for toolbars and such)': (
-        <Layout.Vertical padded center gap={8}>
+      'Using flags: pad center gap (great for toolbars and such)': (
+        <Layout.Vertical pad center gap>
           {aButton}
           {someText}
           {aBox}
@@ -207,6 +207,11 @@ const demos: PreviewProps[] = [
         'boolean (false)',
         'If set, the area of the second child will automatically be made scrollable.',
       ],
+      [
+        'center',
+        'boolean (false)',
+        'If set, all children will use their own height, and they will be centered vertically in the layout. If not set, all children will be stretched to the height of the layout.',
+      ],
     ],
     demos: {
       'Layout.Top': (
diff --git a/desktop/app/src/sandy-chrome/appinspect/AppInspect.tsx b/desktop/app/src/sandy-chrome/appinspect/AppInspect.tsx
index f10577abd..d3e4bcfd3 100644
--- a/desktop/app/src/sandy-chrome/appinspect/AppInspect.tsx
+++ b/desktop/app/src/sandy-chrome/appinspect/AppInspect.tsx
@@ -8,18 +8,15 @@
  */
 
 import React from 'react';
-import {Button, Dropdown, Menu, Radio, Input} from 'antd';
+import {Alert, Button, Input} from 'antd';
 import {LeftSidebar, SidebarTitle, InfoIcon} from '../LeftSidebar';
-import {
-  AppleOutlined,
-  AndroidOutlined,
-  SettingOutlined,
-  RocketOutlined,
-} from '@ant-design/icons';
+import {SettingOutlined, RocketOutlined} from '@ant-design/icons';
 import {Layout, Link} from '../../ui';
 import {theme} from '../theme';
 import {useStore as useReduxStore} from 'react-redux';
 import {showEmulatorLauncher} from './LaunchEmulator';
+import {AppSelector} from './AppSelector';
+import {useStore} from '../../utils/useStore';
 
 const appTooltip = (
   <>
@@ -34,6 +31,7 @@ const appTooltip = (
 
 export function AppInspect() {
   const store = useReduxStore();
+  const selectedDevice = useStore((state) => state.connections.selectedDevice);
   return (
     <LeftSidebar>
       <Layout.Top scrollable>
@@ -42,7 +40,7 @@ export function AppInspect() {
             App Inspect
           </SidebarTitle>
           <Layout.Vertical padv="small" padh="medium" gap={theme.space.large}>
-            <DeviceDropdown />
+            <AppSelector />
             <Input addonAfter={<SettingOutlined />} defaultValue="mysite" />
             <Layout.Horizontal gap>
               <Button icon={<SettingOutlined />} type="link" />
@@ -58,36 +56,22 @@ export function AppInspect() {
             </Layout.Horizontal>
           </Layout.Vertical>
         </Layout.Container>
-        <Layout.Container>Dynamic section</Layout.Container>
+        <Layout.Container padv={theme.space.small}>
+          {selectedDevice ? (
+            <PluginList />
+          ) : (
+            <Alert message="No device or app selected" type="info" />
+          )}
+        </Layout.Container>
       </Layout.Top>
     </LeftSidebar>
   );
 }
 
-function DeviceDropdown() {
+function PluginList() {
   return (
-    <Radio.Group value={1} size="small">
-      <Dropdown
-        overlay={
-          <Menu>
-            <Menu.Item icon={<AppleOutlined />} style={{fontWeight: 'bold'}}>
-              IPhone 11
-            </Menu.Item>
-            <Menu.Item>
-              <Radio value={1}>Facebook</Radio>
-            </Menu.Item>
-            <Menu.Item>
-              <Radio value={3}>Instagram</Radio>
-            </Menu.Item>
-            <Menu.Item icon={<AndroidOutlined />} style={{fontWeight: 'bold'}}>
-              Android
-            </Menu.Item>
-          </Menu>
-        }>
-        <Button icon={<AppleOutlined />} style={{width: '100%'}}>
-          Facebook Iphone11
-        </Button>
-      </Dropdown>
-    </Radio.Group>
+    <Layout.Container>
+      <SidebarTitle>Plugins</SidebarTitle>
+    </Layout.Container>
   );
 }
diff --git a/desktop/app/src/sandy-chrome/appinspect/AppSelector.tsx b/desktop/app/src/sandy-chrome/appinspect/AppSelector.tsx
new file mode 100644
index 000000000..4548ee2ff
--- /dev/null
+++ b/desktop/app/src/sandy-chrome/appinspect/AppSelector.tsx
@@ -0,0 +1,162 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @format
+ */
+
+import React from 'react';
+import {Button, Dropdown, Menu, Radio, Typography} from 'antd';
+import {
+  AppleOutlined,
+  AndroidOutlined,
+  WindowsOutlined,
+  CaretDownOutlined,
+} from '@ant-design/icons';
+import {Layout, styled} from '../../ui';
+import {theme} from '../theme';
+import {batch} from 'react-redux';
+import {Dispatch, useDispatch, useStore} from '../../utils/useStore';
+import {
+  canBeDefaultDevice,
+  getAvailableClients,
+  selectClient,
+  selectDevice,
+} from '../../reducers/connections';
+import BaseDevice, {OS} from '../../devices/BaseDevice';
+import {getColorByApp} from '../../chrome/mainsidebar/sidebarUtils';
+import Client from '../../Client';
+import {State} from '../../reducers';
+
+const {Text} = Typography;
+
+function getOsIcon(os?: OS) {
+  switch (os) {
+    case 'iOS':
+      return <AppleOutlined />;
+    case 'Android':
+      return <AndroidOutlined />;
+    case 'Windows':
+      return <WindowsOutlined />;
+    default:
+      undefined;
+  }
+}
+
+export function AppSelector() {
+  const dispatch = useDispatch();
+  const {
+    devices,
+    selectedDevice,
+    clients,
+    uninitializedClients,
+    selectedApp,
+  } = useStore((state) => state.connections);
+  const entries = computeEntries(
+    devices,
+    dispatch,
+    clients,
+    uninitializedClients,
+  );
+  const client = clients.find((client) => client.id === selectedApp);
+
+  return (
+    <Radio.Group value={selectedApp} size="small">
+      <Dropdown
+        overlay={
+          <Menu selectedKeys={selectedApp ? [selectedApp] : []}>
+            {entries.flat()}
+          </Menu>
+        }>
+        <AppInspectButton title="Select the device / app to inspect">
+          <Layout.Horizontal gap center>
+            <AppIcon appname={client?.query.app} />
+            <Layout.Vertical>
+              <Text strong>{client?.query.app ?? ''}</Text>
+              <Text>
+                {selectedDevice?.displayTitle() || 'Available devices'}
+              </Text>
+            </Layout.Vertical>
+            <CaretDownOutlined />
+          </Layout.Horizontal>
+        </AppInspectButton>
+      </Dropdown>
+    </Radio.Group>
+  );
+}
+
+const AppInspectButton = styled(Button)({
+  background: theme.backgroundTransparentHover,
+  height: 52,
+  border: 'none',
+  width: '100%',
+  fontWeight: 'normal',
+  paddingLeft: theme.space.small,
+  paddingRight: theme.space.small,
+  textAlign: 'left',
+  '&:hover, &:focus, &:active': {
+    background: theme.backgroundTransparentHover,
+  },
+  '.ant-typography': {
+    lineHeight: '20px',
+    overflow: 'hidden',
+    textOverflow: 'ellipsis',
+  },
+});
+
+const AppIcon = styled.div<{appname?: string}>(({appname}) => ({
+  width: 36,
+  height: 36,
+  background: appname
+    ? getColorByApp(appname)
+    : theme.backgroundTransparentHover,
+}));
+
+function computeEntries(
+  devices: BaseDevice[],
+  dispatch: Dispatch,
+  clients: Client[],
+  uninitializedClients: State['connections']['uninitializedClients'],
+) {
+  const entries = devices.filter(canBeDefaultDevice).map((device) => {
+    const deviceEntry = (
+      <Menu.Item
+        icon={getOsIcon(device.os)}
+        key={device.serial}
+        style={{fontWeight: 'bold'}}
+        onClick={() => {
+          dispatch(selectDevice(device));
+        }}>
+        {device.displayTitle()}
+      </Menu.Item>
+    );
+    const clientEntries = getAvailableClients(device, clients).map((client) => (
+      <Menu.Item
+        key={client.id}
+        onClick={() => {
+          batch(() => {
+            dispatch(selectDevice(device));
+            dispatch(selectClient(client.id));
+          });
+        }}>
+        <Radio value={client.id}>{client.query.app}</Radio>
+      </Menu.Item>
+    ));
+    return [deviceEntry, ...clientEntries];
+  });
+  if (uninitializedClients.length) {
+    entries.push([
+      <Menu.Item key="connecting" style={{fontWeight: 'bold'}}>
+        Currently connecting...
+      </Menu.Item>,
+      ...uninitializedClients.map((client) => (
+        <Menu.Item key={'connecting' + client.client.appName}>
+          {client.client.appName}
+        </Menu.Item>
+      )),
+    ]);
+  }
+  return entries;
+}
diff --git a/desktop/app/src/ui/components/Layout.tsx b/desktop/app/src/ui/components/Layout.tsx
index 52d8863ee..e33569512 100644
--- a/desktop/app/src/ui/components/Layout.tsx
+++ b/desktop/app/src/ui/components/Layout.tsx
@@ -29,7 +29,6 @@ type ContainerProps = {
   borderLeft?: boolean;
   bordered?: boolean;
   rounded?: boolean;
-  padded?: boolean;
   width?: number;
   height?: number;
 } & PaddingProps;
@@ -46,6 +45,7 @@ const Container = styled.div<ContainerProps>(
     height,
     ...rest
   }) => ({
+    minWidth: `0`, // ensures the Container can shrink smaller than it's largest
     width,
     height,
     display: 'flex',
@@ -101,6 +101,7 @@ const Horizontal = styled(Container)<DistributionProps>(({gap, center}) => ({
   flexDirection: 'row',
   gap: normalizeSpace(gap, theme.space.small),
   alignItems: center ? 'center' : 'stretch',
+  minWidth: 'auto', // corrects 0 on Container
 }));
 
 const Vertical = styled(Container)<DistributionProps>(({gap, center}) => ({
@@ -118,6 +119,7 @@ type SplitLayoutProps = {
   /**
    * If set, items will be centered over the orthogonal direction, if false (the default) items will be stretched.
    */
+  center?: boolean;
   children: [React.ReactNode, React.ReactNode];
 };
 
diff --git a/desktop/app/src/utils/useStore.tsx b/desktop/app/src/utils/useStore.tsx
index 83e61c47c..133ceb716 100644
--- a/desktop/app/src/utils/useStore.tsx
+++ b/desktop/app/src/utils/useStore.tsx
@@ -12,7 +12,7 @@ import {
   shallowEqual,
   useDispatch as useDispatchBase,
 } from 'react-redux';
-import {Dispatch} from 'redux';
+import {Dispatch as ReduxDispatch} from 'redux';
 import {State, Actions} from '../reducers/index';
 
 /**
@@ -27,9 +27,11 @@ export function useStore<Selected>(
   return useSelector(selector, equalityFn);
 }
 
+export type Dispatch = ReduxDispatch<Actions>;
+
 /**
  * Strongly typed useDispatch wrapper for the Flipper redux store.
  */
-export function useDispatch(): Dispatch<Actions> {
-  return useDispatchBase();
+export function useDispatch(): Dispatch {
+  return useDispatchBase() as any;
 }