Move App styles to index

packages/concordia-app/src/App.jsx

@@ -6,7 +6,6 @@ import LoadingContainer from './components/LoadingContainer';
 import Routes from './Routes';
 import './intl/index';
 import 'semantic-ui-css/semantic.min.css';
-import './assets/css/app.css';
 
 const App = ({ store }) => (
     <Provider store={store}>

packages/concordia-app/src/assets/css/app.css → packages/concordia-app/src/assets/css/index.css

@@ -2,6 +2,10 @@ body {
     margin: 1em !important;
 }
 
+#root {
+    height: 100%;
+}
+
 .i18next-newlines {
     white-space: pre-line !important;
 }