message: reorganize imports in NotificationController
diff: -import {
  - Authorized, BadRequestError, Body, CurrentUser, Delete, Get, JsonController, NotFoundError, Param,
  - Post,
  - UseBefore
  -} from 'routing-controllers';
  +import {Get, Post, Delete, Param, Body, CurrentUser, Authorized,
  + UseBefore, BadRequestError, JsonController, NotFoundError} from 'routing-controllers';
  import passportJwtMiddleware from '../security/passportJwtMiddleware';
  -import {
  - NotificationSettings,
  - API_NOTIFICATION_TYPE_ALL_CHANGES,
  -} from '../models/NotificationSettings';
  +import {NotificationSettings, API_NOTIFICATION_TYPE_ALL_CHANGES} from '../models/NotificationSettings';
  import {Notification} from '../models/Notification';
  import {Course} from '../models/Course';
  import {User} from '../models/User';
  