Add multimedia sub-categories
Summary: FEATURE: 388933
Test Plan:
Tested in KDE Neon. The top 10-15 entries in each category are good, but the Audio Players and Video Players categories have far too many items as a result of poor app category tagging. Further work is needed to reduce these lists to manageable levels, but hopefully this is better than nothing for now.
Audio and Video editors:
Audio Players:
CD and DVD:
Video Players:
Reviewers: Discover Software Store, apol
Reviewed By: Discover Software Store, apol
Subscribers: plasma-devel
Tags: Plasma
Differential Revision: https://phabricator.kde.org/D10622