CSS import cleanup
CSS import cleanup

Use '~' to resolve node_module.

Reference: https://github.com/webpack-contrib/less-loader#webpack-resolver

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