Fix @action decorator not working
Fix @action decorator not working

The class was never made observable in the first place...

ppy/osu-web,notbakaneko/osu-web,nanaya/osu-web,nanaya/osu-web,nanaya/osu-web,ppy/osu-web,LiquidPL/osu-web,ppy/osu-web,LiquidPL/osu-web,LiquidPL/osu-web,notbakaneko/osu-web,notbakaneko/osu-web,nanaya/osu-web,nanaya/osu-web,LiquidPL/osu-web,notbakaneko/osu-web,notbakaneko/osu-web,ppy/osu-web,LiquidPL/osu-web,ppy/osu-web