Improve "user-trash" icon
Summary:
Make some gradients and details look better.
Old:
New:
Test Plan: Search for "user-trash" in Cuttlefish.
Reviewers: VDG, ngraham, ndavis
Reviewed By: VDG, ngraham, ndavis
Subscribers: ngraham, kde-frameworks-devel, VDG
Tags: Frameworks
Differential Revision: https://phabricator.kde.org/D23711
