Update 4.91.1

Update 4.91.1
* New game type - Custom Game

* Found and fixed a bug with the inability to connect players to each other
* Fixed crashes from the game on some mobile devices on certain maps
* Fixed a bug with the end of the battle when the game is accidentally minimized
* Fixed a bug with clan research
* Fixed critical zones of Nightmare tanks, fixed sights of some tanks
* Other technical fixes