Removed a bunch of flicker from header resizing.
Removed a bunch of flicker from header resizing.

janstk/ui,robbiev/ui,mirrr/ui,292388900/ui,beni55/ui,ProtonMail/ui,mirrr/ui,beni55/ui,cainiaocome/ui,hajimehoshi/ui,ProtonMail/ui,ProtonMail/ui,mirrr/ui,HunterChen/ui,292388900/ui,robbiev/ui,janstk/ui,cainiaocome/ui,hajimehoshi/ui,cainiaocome/ui,janstk/ui,robbiev/ui,HunterChen/ui,HunterChen/ui,hajimehoshi/ui,292388900/ui,beni55/ui