gtk-demo: Fix revealer demo
This only used by luck before. We are changing a property from the ::notify handler for that property. Now that GtkRevealer is notifying the property when it stops animations on unmap, we end up in a life lock situation where we never make it out of the notify queue. Fix this by not restarting the animation if the widget is unmapped.
Showing with 6 additions and 3 deletions