Enable anti-aliasing for user avatars
Summary: By default, QT uses fast transformations when scaling pixmaps but it results in a very pixelated image. This patch fixes it for avatars in the user manager module.
Test Plan:
Resolution of the original avatar image is 256x256.
Before:
After:
Reviewers: Plasma, davidedmundson
Reviewed By: Plasma, davidedmundson
Subscribers: abetts, davidedmundson, ngraham, plasma-devel
Tags: Plasma
Differential Revision: https://phabricator.kde.org/D12468