Merge branch 'contextual-bar-redesign' of github.com:RocketChat/Rocket.Chat into contextual-bar-redesign

Merge branch 'contextual-bar-redesign' of github.com:RocketChat/Rocket.Chat into contextual-bar-redesign

# Conflicts:
#	package-lock.json

[FIX] Fix livechat build

[FIX] Fix closing livechat inquiry

Closes #9445

Add community bot

[FIX] Slash command 'unarchive' throws exception if the channel does not exist 

[FIX] Force enable Livechat Facebook integration on specific errors

Move all npm from meteor packages to package.json & Update versions

[FIX] Missing sidebar paddings on mobile

Sync With RocketChat

[FIX] Fix incoming livechat when impersonating an agent

[FIX] Slash command 'archive' throws exception if the channel does not exist

[FIX] Subscriptions not removed when removing user

Bypass the cache and find the subscriptions directly from database to prevent the in memory changes while deleting.

The for each of the array in memory does not works cuz the array is changing the size.

Notify user if channel does not exist

[NEW] Sidebar menu option to mark room as unread

[NEW] Add mention-here permission #7631

[NEW] Indicate the Self DM room

[NEW] new layout for emojipicker