[Pager] Improve label legibility
Currently, when displaying pager labels (either number or name), text legibility is
often poor or even non-existent, because the label is drawn below things that can
and frequently do obscure it.
This patch puts the label on top, so it's always legible.
Before, displaying VD/Activity number:
After, displaying VD/Activity number:
Before, displaying VD/Activity name:
After, displaying VD/Activity name:
Reviewed By: Plasma, hein
Subscribers: filipf, abetts, ndavis, plasma-devel
Differential Revision: https://phabricator.kde.org/D20851