feat: storage module refactor + UI fixes

server/modules/storage/dropbox/definition.yml

@@ -0,0 +1,6 @@
+key: dropbox
+title: Dropbox
+author: requarks.io
+props:
+  appKey: String
+  appSecret: String

server/modules/storage/dropbox/storage.js

@@ -0,0 +1,23 @@
+module.exports = {
+  async activated(opts) {
+
+  },
+  async deactivated(opts) {
+
+  },
+  async init(opts) {
+
+  },
+  async created(opts) {
+
+  },
+  async updated(opts) {
+
+  },
+  async deleted(opts) {
+
+  },
+  async renamed(opts) {
+
+  }
+}