color monochrome icons to tooltip colors
Summary:
when the tooltips are dark, monochrome icons can be black on black
use kiconloader with a custom palette to color any eventual monochrome icon
Test Plan: monochrome icons appear white
Reviewers: Plasma, sitter
Reviewed By: sitter
Subscribers: broulik, ngraham, plasma-devel
Tags: Plasma
Differential Revision: https://phabricator.kde.org/D19596