Use large colorful category icons in Dolphin settings
Summary:
Ref task T10165
Depends on D23749
Test Plan: Open the Dolphin settings dialog.
Reviewers: Dolphin, VDG, ndavis, ngraham
Reviewed By: Dolphin, VDG, ndavis, ngraham
Subscribers: ngraham, ndavis, kfm-devel, VDG, Dolphin
Tags: Dolphin
Maniphest Tasks: T10165
Differential Revision: https://phabricator.kde.org/D23750