Color icons in titlebar if possible
Summary:
Some icons can be recolored. However if the titlebar color is different
compared to the normal color scheme, this can lead to bad contrast.
Test Plan:
Before:
After:
Reviewers: Plasma, VDG, ngraham
Reviewed By: VDG, ngraham
Subscribers: kossebau, ngraham, plasma-devel
Tags: Plasma
Differential Revision: https://phabricator.kde.org/D28330