Added App Setttings Modal

app/javascript/mastodon/reducers/local_settings.js

@@ -3,7 +3,22 @@ import { STORE_HYDRATE } from '../actions/store';
 import Immutable from 'immutable';
 
 const initialState = Immutable.Map({
-  layout: 'auto',
+  layout    : 'auto',
+  stretch   : true,
+  collapsed : {
+    enabled     : true,
+    auto        : {
+      all              : false,
+      notifications    : true,
+      lengthy          : true,
+      replies          : false,
+      media            : false,
+    },
+    backgrounds : {
+      user_backgrounds : false,
+      preview_images   : false,
+    },
+  },
 });
 
 const hydrate = (state, localSettings) => state.mergeDeep(localSettings);
@@ -11,7 +26,7 @@ const hydrate = (state, localSettings) => state.mergeDeep(localSettings);
 export default function localSettings(state = initialState, action) {
   switch(action.type) {
   case STORE_HYDRATE:
-    return hydrate(state, action.state.get('localSettings'));
+    return hydrate(state, action.state.get('local_settings'));
   case LOCAL_SETTING_CHANGE:
     return state.setIn(action.key, action.value);
   default: