They are toggle buttons + status.
Buttuns

- 01.png (36.02 KiB) Viewed 2824 times
Toggle buttons

- 02.png (37.51 KiB) Viewed 2824 times
But if you preferred:
# if RuneUI Enhancement installed:
sed -i -e 's/fa-play\(.*addClass.*\)pause/fa-pause\1play/
' -e '0,/pause.*addClass.*play/ s/pause\(.*addClass.*\)play/play\1pause/
' /srv/http/assets/js/custom.js
# No RuneUI Enhancement
sed -i -e 's/fa-play\(.*addClass.*\)pause/fa-pause\1play/
' -e '0,/pause.*addClass.*play/ s/pause\(.*addClass.*\)play/play\1pause/
' /srv/http/assets/js/runeui.js
sed -i -e 's/fa-play\(.*addClass.*\)pause/fa-pause\1play/
s/pause\(.*addClass.*\)play/play\1pause/
' /srv/http/assets/js/runeui.min.js
If it confuses many people, may be I should make an addon.