Fix blurry icons by adding UseHighDpiPixmaps flag
Summary:
When using fractional scaling, icons on the top are blurred. This patch fixes the issue.
The only change needed to the code is to find a better placement for the line.
Test Plan:
No side effects.
Before:
After:
Reviewers: KDE Applications, sdepiets
Reviewed By: sdepiets
Subscribers: davidedmundson, sdepiets
Differential Revision: https://phabricator.kde.org/D29376