This is now not needed anymore since `PlacesItemModel::cleanupBookmarks` (now removed) from https://phabricator.kde.org/D9333 has run for on users systems.
Accepts Ark's special dnd mime types so that archive contents can
be dragged onto a place to extract and/or (mount and) switch to the
hovered location.
There are various places where Dolphin created a new KFilePlacesModel which would then query all storage devices and do other expensive work.
Differential Revision: https://phabricator.kde.org/D11283