[Task Manager] Do not crop album art in tooltip
- The standard aspect ratio of albumImage is always 1:1. We should not crop the important part of albumArt in some cases.
- Hide the window title text of media players to avoid displaying the title/artist repeatedly.
Before vs After:
- Breeze Dark
- Breeze Light
Reviewers: hein, broulik, ngraham, VDG, filipf, rooty
Reviewed By: ngraham, VDG, filipf, rooty
Subscribers: mvourlakos, rooty, filipf, ndavis, abetts, plasma-devel
Differential Revision: https://phabricator.kde.org/D17073