rename fill attribute

Summary:
We were using `fill={true}` as an attribute to make flexbox containers fill the entire available space.

However, `fill` is an HTML attribute (see: https://developer.mozilla.org/en-US/docs/Web/SVG/Attribute/fill) This caused warnings printed to the console.

This diff renames the attribute to `grow` with is also more in line with the Flexbox terminology.

Reviewed By: priteshrnandgaonkar

Differential Revision: D10488389

fbshipit-source-id: ed8553c6203cdf6df94d26c731164ecec4c9fbd2

src/plugins/layout/index.js

@@ -1120,7 +1120,7 @@ export default class Layout extends FlipperPlugin<InspectorState> {
     } = this.state;
 
     return (
-      <FlexColumn fill={true}>
+      <FlexColumn grow={true}>
         <Toolbar>
           <SearchIconContainer
             onClick={this.onFindClick}
@@ -1197,7 +1197,7 @@ export default class Layout extends FlipperPlugin<InspectorState> {
               </SearchIconContainer>
             )}
         </Toolbar>
-        <FlexRow fill={true}>
+        <FlexRow grow={true}>
           {initialised ? (
             <ElementsInspector
               onElementSelected={this.onElementSelected}
@@ -1210,7 +1210,7 @@ export default class Layout extends FlipperPlugin<InspectorState> {
               elements={elements}
             />
           ) : (
-            <Center fill={true}>
+            <Center grow={true}>
               <LoadingIndicator />
             </Center>
           )}