Persist UI settings, add missing localizations for German

app/assets/javascripts/components/reducers/settings.jsx

@@ -0,0 +1,32 @@
+import { SETTING_CHANGE } from '../actions/settings';
+import { STORE_HYDRATE } from '../actions/store';
+import Immutable from 'immutable';
+
+const initialState = Immutable.Map({
+  notifications: Immutable.Map({
+    alerts: Immutable.Map({
+      follow: true,
+      favourite: true,
+      reblog: true,
+      mention: true
+    }),
+
+    shows: Immutable.Map({
+      follow: true,
+      favourite: true,
+      reblog: true,
+      mention: true
+    })
+  })
+});
+
+export default function settings(state = initialState, action) {
+  switch(action.type) {
+  case STORE_HYDRATE:
+    return state.merge(action.state.get('settings'));
+  case SETTING_CHANGE:
+    return state.setIn(action.key, action.value);
+  default:
+    return state;
+  }
+};