Groups -> Communities in the UI

Translation files still need updating, and this would be much simpler with a script that could automate the tedium

src/UserSettingsStore.js

@@ -28,7 +28,7 @@ import SdkConfig from './SdkConfig';
 const FEATURES = [
     {
         id: 'feature_groups',
-        name: _td("Groups"),
+        name: _td("Communities"),
     },
 ];