Use Slider and FloatingActionbutton in the playback view. This is not
because I wanted to, but because there were insane bugs on Lollipop
devices that stemmed from them being unable to load complex selector
resources.
Re-add 2x2 widgets. They were originally removed due to strange layouts
in landscape mode, but that has now been fixed with a new "tiny" layout
meant for that specific edge case. Also rename the widget forms to more
sensible names and make the small (previously minimal) widget be
text-only again.