Fixed up todo.md to remove things that are done and add more notes.
Fixed up todo.md to remove things that are done and add more notes.

hajimehoshi/ui,UIKit0/ui,HunterChen/ui,cainiaocome/ui,UIKit0/ui,ProtonMail/ui,janstk/ui,hajimehoshi/ui,292388900/ui,cainiaocome/ui,HunterChen/ui,mirrr/ui,ProtonMail/ui,beni55/ui,robbiev/ui,beni55/ui,beni55/ui,robbiev/ui,292388900/ui,janstk/ui,janstk/ui,hajimehoshi/ui,HunterChen/ui,cainiaocome/ui,robbiev/ui,292388900/ui,UIKit0/ui,ProtonMail/ui,mirrr/ui,mirrr/ui