UI improvements

* Now disabling disc info panel(s) after drive buttons have been clicked
* Check toggle button added in place of rip header
space sanitization updates

Updated strip_spaces order in sanitizer to be last up, eliminating
double dashes and whatnot. Also made the regex a bit better
caching and panel disabling

* Added panel disabling via socket
* Tweaked caching/input disabling for more accuracy
* display_cache now sends panel disable signals to client in event that
disc is busy
* fixed regex that I broke last commit