[breeze-icons] Revamp system.svgz
Summary: This patch adds new icons for the action buttons modified/added in D18893, and gives the suspend hibernate and switch user icons a makeover.
Test Plan:
Other..:
List Users:
Reviewers: VDG, Plasma, ngraham, abetts
Reviewed By: VDG, ngraham
Subscribers: filipf, trickyricky26, ndavis, broulik, kde-frameworks-devel
Tags: Frameworks
Differential Revision: https://phabricator.kde.org/D19020