Fix validation not working if contest didn't have forced dimensions set and convert async/await syntax to promise
Fix validation not working if contest didn't have forced dimensions set and convert async/await syntax to promise

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