New: Native Theme Engine

Co-Authored-By: Zak Saunders <1936903+thezak48@users.noreply.github.com>

frontend/src/App/App.js

@@ -4,6 +4,7 @@ import React from 'react';
 import DocumentTitle from 'react-document-title';
 import { Provider } from 'react-redux';
 import PageConnector from 'Components/Page/PageConnector';
+import ApplyTheme from './ApplyTheme';
 import AppRoutes from './AppRoutes';
 
 function App({ store, history }) {
@@ -11,9 +12,11 @@ function App({ store, history }) {
     <DocumentTitle title={window.Radarr.instanceName}>
       <Provider store={store}>
         <ConnectedRouter history={history}>
-          <PageConnector>
-            <AppRoutes app={App} />
-          </PageConnector>
+          <ApplyTheme>
+            <PageConnector>
+              <AppRoutes app={App} />
+            </PageConnector>
+          </ApplyTheme>
         </ConnectedRouter>
       </Provider>
     </DocumentTitle>