Archamon 2.0.20 beta update

!+ fixed population error after loading the game !+ fixed diplomacy system (critical) !+ fixed barbarian activity !+ fixed lumberjack function !+ fixed menu sound !+ fixed incorrect connection of corner walls !+ fixed rounding in barbarian requests !+ fixed incorrect window size on the first launch

• revision of the use of automatic top menu switcher
• optimization of object selection on the map
• changed maximum camera altitude