Move event subscription to LoadComplete
Move event subscription to LoadComplete

Prevents attempting to read from the `colours` field before it is
actually injected.

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