Convert App to TypeScript

(cherry picked from commit d6d90a64a39d3b9d3a95fb6b265517693a70fdd7)
(cherry picked from commit 428569106499b5e3a463f1990ae2996d1ae4ab49)
(cherry picked from commit d0e9504af0d88391a74e04b90638e4b2d99fb476)
(cherry picked from commit ee80564dd427ca1dc14c192955efaa61f386ad44)
(cherry picked from commit 76650af9fdc7ef06d13ce252986d21574903d293)

frontend/src/Components/Page/Page.js

@@ -1,8 +1,8 @@
 import PropTypes from 'prop-types';
 import React, { Component } from 'react';
-import AppUpdatedModalConnector from 'App/AppUpdatedModalConnector';
+import AppUpdatedModal from 'App/AppUpdatedModal';
 import ColorImpairedContext from 'App/ColorImpairedContext';
-import ConnectionLostModalConnector from 'App/ConnectionLostModalConnector';
+import ConnectionLostModal from 'App/ConnectionLostModal';
 import SignalRConnector from 'Components/SignalRConnector';
 import AuthenticationRequiredModal from 'FirstRun/AuthenticationRequiredModal';
 import locationShape from 'Helpers/Props/Shapes/locationShape';
@@ -102,12 +102,12 @@ class Page extends Component {
             {children}
           </div>
 
-          <AppUpdatedModalConnector
+          <AppUpdatedModal
             isOpen={this.state.isUpdatedModalOpen}
             onModalClose={this.onUpdatedModalClose}
           />
 
-          <ConnectionLostModalConnector
+          <ConnectionLostModal
             isOpen={this.state.isConnectionLostModalOpen}
             onModalClose={this.onConnectionLostModalClose}
           />