Fix single frame delay and fade in when replacing full text of a textbox
Fix single frame delay and fade in when replacing full text of a textbox

ppy/osu-framework,peppy/osu-framework,smoogipooo/osu-framework,peppy/osu-framework,smoogipooo/osu-framework,peppy/osu-framework,ppy/osu-framework,ppy/osu-framework