Change the old Mail toolbar bitmap buttons to HVIF icons
completed by: Freeman Lou
mentors: Barrett, Philippe Houdoin, TriEdgeAI, jscipione
Haiku still has a few old bitmaps icons that stem from opentracker and BeOS. They don't look so great in the modern world and don't scale well on larger screens.
Your job is to fix a way to remove a old bitmap icon and replace it with a new HVIF icon.