* MM-40093: adds remote action to sync threads
Syncing threads fetches all unread threads if there are no threads in
the DB.
If there are threads in the DB it fetches all threads newest than the
newest one we have stored.
Fetching happens in batches of 60 threads at a time.
* Fixes querying for all threads list
* Syncs threads on WS reconnection
* Addresses review comments
* Addresses review comments
* Sets values on my_channel according to CRT
* Team counts with regard to CRT
* Fixes myChannel.is_unread with regard to CRT
* Include DM/GMs for thread counts on demand
* Incorporate thread mention counts in server/channel
* Channel updates in regard to CRT
* WS Events, Actions, Queries, Thread Follow, Post Query
* i18n changes
* Misc
* Only unread threads are marked as read
* Mark threads from WS even as visible in Global threads
* Merge fixes
* Update thread_post_list.tsx
* Merge fix
* Feedback fix
* Make teamId in handleThreads optional for unfollowed threads
* Removed unwated type and return
* Review changes
* Removing unused model
* Merge fix
* Misc fixes
* Following button query change
