Change background color of a 'controls' visualization component

@Marius_Dragomir, thanks again.
I have 3 more questions in the blog, I would really appreciate an answer to. Is there any way to get them on someone's radar?
1 - Timelion won't show anything in the graph for any metric other than "count"
2 - Selecting multiple time-frames to compare data/performace
3 - Canvas filter's title - How can I replace the "--ANY--"?