43 [Subtask] UI looks better and improved
Added a background color for the mainmenu and the lobby + centered lobby
Co-authored-by: LQ63 <lkhermann@web.de> Reviewed-on: #38 Co-authored-by: Janis <janis.e.20@gmx.de> Co-committed-by: Janis <janis.e.20@gmx.de>
