모드가 두번씩 설정되는 버그 수정.
UI/Room -> UI/Lobby
전반적인 안정성 개선.
Merge branch 'master' of https://github.com/geoidn2/snugdc-project-ricochet into game_fixing
Merge branch 'master' of https://github.com/geoidn2/snugdc-project-ricochet
안정성 개선.
Merge branch 'master' of https://github.com/geoidn2/snugdc-project-ricochet

Conflicts:
	SuperCrateBox/Assets/Scenes/UI/ui_mainmenu.unity