[ #20951 ] Start porting contact model to QAbstractItemModel
[ #20951 ] Fix contact model
[ #20951 ] Port categorized tree to QTreeView (from QTreeWidget)
[ #20951 ] Port the contact delegate from QWidget to QItemDelegate
[ #20951 ] Restore contact contextmenu
[ #20951 ] Add phone number delegate
[ #20951 ] Move to a real proxyfilter model
[ #20951 ] Port filters and sorting to a new, cleaner model
[ #21731 ] Port history to abstractmodel (1/3)
[ #21731 ] Port history to abstractmodel (2/3)
[ #21731 ] Port history to abstractmodel (3/3)
[ #22057 ] Add working bookmark model (1/3)
[ #22057 ] Add working bookmark model (2/3)
[ #22057 ] Add working bookmark model (3/3)
[ #22058 ] Port history, contact and bookmark dock to Qt Designer
[ #22324 ] Restore support for double click
[ #22324 ] Restore support for dropping history/contacts/bookmarks into callview
[ #22324 ] Re-implement the drop overlay.

It was implemented twice, once using proxy style and the other by implementing drag{Enter,Leave,Move} methods.
Both implementations are buggy. For now, it use the later one. In the future, the former is probably less tricky
to get "right".
[ #22324 ] Improve drag and drop. This is now on hold until callmodel is ported away from the template
[ #22928 ] Port CallModel to abstractitemmodel (1/6)