+1 on Badmouth's advice on the buttons. One other thing you can do is take a rat-tail file to the one of the holes to enlarge it just slightly for a little more wiggle room; just a little bit, so the top lip of the button will still cover it. That is only a last resort though, try Badmouth's advice first.
As for the turning on the TV and marquee light, search about smart power strips.
Your control panel is looking very nice. I like the white buttons on black, with the red nearby. Also, you did a great job of minimizing the admin buttons to only what's needed. Very clean.
As for the happ buttons, you can't get white Sanwa 24mm screw-ins anyway. The closest you can get is a white Sanwa 24mm plunger from a snap-in in a white Seimitsu screw-in body. That's what I did in the pic a few posts back.