[Bug 29437] No 'Preview' button

[Emmanuel Rodriguez]

Public bug reported:
https://launchpad.net/malone/bugs/29437

Affects: gnome-screensaver (Ubuntu)
       Severity: Normal
       Priority: (none set)
         Status: Unconfirmed

Description:
The new gnome-screensaver doesn't have a preview button. 
The preview button can be useful when selecting a OpenGL screen saver to see if the rendering in full screen will be
done at a reasonable frame rate.