Use colorful icon in KCM
Summary:
Use a nice new colorful icon.
Master only since this icon is provided by a symlink created in Frameworks 5.56.
CCBUG: 386748
Test Plan:
Before:
After:
Reviewers: VDG, ndavis
Reviewed By: VDG, ndavis
Subscribers: plasma-devel
Tags: Plasma
Differential Revision: https://phabricator.kde.org/D18800