Fix blurry icons by adding UseHighDpiPixmaps flag
Summary: When using fractional scaling, some icons are blurred. This patch fixes the issue.
Test Plan:
No side effects.
Before:
After:
Reviewers: KDE Applications, ngraham
Reviewed By: KDE Applications, ngraham
Subscribers: kde-utils-devel
Differential Revision: https://phabricator.kde.org/D29452