Refactor: Inbox store, remove inboxes from sidebar (#387)

* Refactor: Inbox store, remove inboxes from sidebar

* Add a new page for inbox settings

* Show inboxes on sidebar

* Add inbox_members API

* Disable similar-code check

* Fix codeclimate scss issues

* Add widget_color update API and actions

* Add specs for inbox store

* Fix Facebook auth flow

* Fix agent loading, inbox name

app/javascript/dashboard/store/modules/inboxMembers.js

@@ -0,0 +1,24 @@
+import InboxMembersAPI from '../../api/inboxMembers';
+
+const state = {};
+
+const getters = {};
+
+const actions = {
+  get(_, { inboxId }) {
+    return InboxMembersAPI.show(inboxId);
+  },
+  create(_, { inboxId, agentList }) {
+    return InboxMembersAPI.create({ inboxId, agentList });
+  },
+};
+
+const mutations = {};
+
+export default {
+  namespaced: true,
+  state,
+  getters,
+  actions,
+  mutations,
+};