* Denormalize the User’s Highlights

* Find subscriptions for each type of notification

* Change email preference values

* General improvements

* Use just one query to get all subscriptions to notify

* Get hightlights from subscriptions on method notifyUsersOnMessage

* Keep compatibility of emailNotifications preference in subscription save

* Prevent group mentions on large rooms

[NEW] Add REST endpoints `channels.roles` & `groups.roles`

* Added validation in chat.postMessage endpoint

* fix required parameters and add more tests cases.

* Added the same validation to chat.sendMessage method too.

* changed validation level, set in sendMessage method

* Improvements in the sendMessage function, removed underscore uses, and try catch unnecessary

* Fix test in chat.sendMessage endpoint, and fix error in sendMessage function

* fix review

[NEW] Option to ignore users on channels

[NEW] Search Provider Framework

* Added missing userId

* Fixed roomFiles method to return files without users too

* Added migration to add userId on orphan files

* Changed migration code to make sure the message exist before trying to use it's data

* Rename method to clean history of messages

* Add test case with user without permission to delete room messages

[FIX] REST spotlight API wasn't allowing searches with # and @

[NEW] REST API endpoint `/directory`

[FIX] Add oauth services missing fields, and indicate whether the oauth service is customized (#10299)

[FIX] REST API OAuth services endpoint were missing fields and flag to indicate custom services

* Add REST /forgotPassword endpoint and tests

* Add REST /forgotPassword endpoint and tests

* Remove endpoint, from wrong file

* Moving endpoint from /forgotPassword to /users.forgotPassword

* This commit brings back the view mode for messages. In addition the name changed from viewMode to messageViewMode to avoid any confusion with sidebarViewMode (+ migration to change name in database as well)

* viewMode field needs to be unset in an extra call, because the first one still works with it.

* - Reverted language file changes for Sidebar_view_mode and Message_view_mode as both still will be translated with View_mode
- Created an own section for Notifications in Account Preferences. Brings View Mode a bith more in context to it's section header
- Optimized migration

* Use update instead of create, because document may already be created by script.

* Fixed lint errors

* Renamed translation "View_mode_info" to "Message_view_mode_info" in all translation files I missed yesterday.

* Removed auto-translations

[NEW] REST API endpoint `rooms.favorite` to favorite and unfavorite rooms

[BREAK] The property "settings" is no longer available to regular users via rest api

[FIX] Wrong pagination information on /api/v1/channels.members

* Fix the chat.react api being invalid

* Remove duplicated code

* Add tests for chat.react endpoint

Add deprecation warning to user.roles endpoint

Renaming channels.notifications Get/Post endpoints to subscriptions.getOne and rooms.saveNotifications

Add roles and preferences to /me endpoint and remove users.roles endpoint

added count, total, and offset fields in response object

added pagination to channels.getAllUserMentionsByChannel endpoint.

fix tests, changed the find way to retrieve subscription and fix validation to channels.notifications

fix lint problem

Added buttons Properties to response in settings.oauth endpoint

rename endpoind to settings.oauth and fix lint problems

Added GET/POST channels.notifications