Move app/src (mostly) to flipper-ui-core/src

Summary:
This diff moves all UI code from app/src to app/flipper-ui-core. That is now slightly too much (e.g. node deps are not removed yet), but from here it should be easier to move things out again, as I don't want this diff to be open for too long to avoid too much merge conflicts.

* But at least flipper-ui-core is Electron free :)
* Killed all cross module imports as well, as they where now even more in the way
* Some unit test needed some changes, most not too big (but emotion hashes got renumbered in the snapshots, feel free to ignore that)
* Found some files that were actually meaningless (tsconfig in plugins, WatchTools files, that start generating compile errors, removed those

Follow up work:
* make flipper-ui-core configurable, and wire up flipper-server-core in Electron instead of here
* remove node deps (aigoncharov)
* figure out correct place to load GKs, plugins, make intern requests etc., and move to the correct module
* clean up deps

Reviewed By: aigoncharov

Differential Revision: D32427722

fbshipit-source-id: 14fe92e1ceb15b9dcf7bece367c8ab92df927a70

desktop/flipper-ui-core/src/utils/promiseTimeout.tsx

@@ -0,0 +1,66 @@
+/**
+ * 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 {timeout} from 'flipper-plugin';
+import {StatusMessageType} from '../reducers/application';
+
+/**
+ * @deprecated use timeout from flipper-plugin
+ * @param ms @
+ * @param promise
+ * @param timeoutMessage
+ * @returns
+ */
+export default function promiseTimeout<T>(
+  ms: number,
+  promise: Promise<T>,
+  timeoutMessage?: string,
+): Promise<T> {
+  return timeout(ms, promise, timeoutMessage);
+}
+
+export function showStatusUpdatesForPromise<T>(
+  promise: Promise<T>,
+  message: string,
+  sender: string,
+  addStatusMessage: (payload: StatusMessageType) => void,
+  removeStatusMessage: (payload: StatusMessageType) => void,
+): Promise<T> {
+  const statusMsg = {msg: message, sender};
+  addStatusMessage(statusMsg);
+  return promise
+    .then((result) => {
+      removeStatusMessage(statusMsg);
+      return result;
+    })
+    .catch((e) => {
+      removeStatusMessage(statusMsg);
+      throw e;
+    });
+}
+
+export function showStatusUpdatesForDuration(
+  message: string,
+  sender: string,
+  duration: number,
+  addStatusMessage: (payload: StatusMessageType) => void,
+  removeStatusMessage: (payload: StatusMessageType) => void,
+): void {
+  showStatusUpdatesForPromise(
+    new Promise<void>((resolve, _reject) => {
+      setTimeout(function () {
+        resolve();
+      }, duration);
+    }),
+    message,
+    sender,
+    addStatusMessage,
+    removeStatusMessage,
+  );
+}