Prevent editor from crashing for rulesets with no compose screen implementation
Prevent editor from crashing for rulesets with no compose screen implementation

peppy/osu,peppy/osu,NeoAdonis/osu,peppy/osu,UselessToucan/osu,smoogipoo/osu,ppy/osu,NeoAdonis/osu,smoogipoo/osu,smoogipooo/osu,peppy/osu-new,NeoAdonis/osu,UselessToucan/osu,smoogipoo/osu,ppy/osu,UselessToucan/osu,ppy/osu