Fallback OptionShowPlayerNames to 'on' when it is nil

Author: Gatsik

lua/ui/override/ArmiesTable.lua

@@ -40,7 +40,7 @@
 local Prefs = import("/lua/user/prefs.lua")
 
 ---@type 'on' | 'allies-only' | 'off'
-OptionShowPlayerNames = Prefs.GetFromCurrentProfile('options.options_show_player_names')
+OptionShowPlayerNames = Prefs.GetFromCurrentProfile('options.options_show_player_names') or 'on'
 
 ---@param armiesTable ArmiesTable
 ---@return ArmiesTable