The "Shortcuts" preferences in Haiku uses Santa's Gift Bag column list view. Not only this does not look good, it also has a restrictive license that doesn't allow us to easily modify it. Rework the Shortcut preferences so it uses the new ColumnListView class.

Shortcut prefernces (the clv folder should be deleted and the preflet made to use new CLV):

http://cgit.haiku-os.org/haiku/tree/src/preferences/shortcuts

New Column List View:

http://cgit.haiku-os.org/haiku/tree/headers/private/interface/ColumnListView.h

Haiku track ticket: https://dev.haiku-os.org/ticket/11007