Custom themes fixes

I fixed some parts of the website that were not changing colors.

I should have thought of this earlier but its going to be such a pain to keep the themes feature up to date with youtubes ui hence I am going to mark it as an experimental feature until I figure out how to change the themes in a better way.

Playback speed controls without premium

I am super happy with how this feature turned out it looks exactly like youtubes ui.