[LMP Potorchu] Added VisWidget stubs.
[LMP Potorchu] Refactored stuff to SetOverlay().
[LMP Potorchu] Use VisWidget.
[LMP Potorchu] Add visualization tab.
[LMP Potorchu] Set sync bus hook for X overlay setting.
[Tools] Disable Azoth OTRoid build on openSUSE Factory.

See bug https://bugzilla.novell.com/show_bug.cgi?id=877233.

Revert this when openSUSE guys fix their crappy patches.