Remove shared message handling from ColorListView,
you are expected to implement this yourself and these
message constants were not actually being used by
the message target.
Do color drop handling in Appearance and Terminal.
Handle all color drops in WasDropped().
Allow current selection to remain, only update color.
TODO Changing selection on external drops should be
fixed in BListView. Work-around in BColorListView.
Fixes#19562
Change-Id: Ic99bbb1288fd736778eac831d38e453122815abc
Reviewed-on: https://review.haiku-os.org/c/haiku/+/9296
Reviewed-by: John Scipione <[email protected]>
Tested-by: Commit checker robot <[email protected]>
Reviewed-by: waddlesplash <[email protected]>
John Scipione
15c87be3ea