add a preview for the disk quota plasmoid
Summary: disk quota plasmoid is in the default set in kdeplasma-addons, should have a preview
Reviewers: Plasma, VDG, andreask, andreaska
Reviewed By: andreaska
Subscribers: andreaska, plasma-devel, Frameworks
Tags: Plasma, Frameworks
Differential Revision: https://phabricator.kde.org/D4649
