Added HUD layout updates on status bar visibility change.
Set background resource to normal switch screen on long click.
Removed all unused click listeners in SingleSwitchTouchInterface and TeclaHUDOverlay.
Merge branch 'issue-243' into issue-275

Conflicts:
	package/tecla/addon/TeclaHUDOverlay.java
Merge branch 'issue-275' into issue-274

Conflicts:
	package/tecla/addon/TeclaHUDOverlay.java