Feature/bca/room upgrade

[BillCarsonFr]

Add support for room version capabilities and room upgrade.

SDK Changes

Introduces a new RoomVersionService (implemented by Room):

• fun getRoomVersion(): String
• fun upgradeToVersion(version: String): String
• fun getRecommendedVersion() : String
• fun userMayUpgradeRoom(userId: String): Boolean
• fun isUsingUnstableRoomVersion(): Boolean

UI

Ugrade Room
Support /upgraderoom command. Will show a dialog bottomsheet with some options with proper progress report (for auto invite), and proper error handling

Join Replacement Room

Adds proper progress and error reporting when joining a replacement room.
Previously was done in background with a toaster on error. As joining can take long, a dialog will show up with progress and error

__ Detect unstable room version__

If the user can upgrade a room, in the settings a warning will be shown if the room is using an unstable room version with a button to upgrade

Tombstine item rendering update

Was missing some margins, and was inconsistent from replaced room to replacement room

Dev Tools

In developer mode, room version capabilities will be visible in HomeServer settings page

Fixes #3507

[bmarty]

LGTM, I've pushed 3 commits to fix some issues and cleanup the code.