clutter-offscreen-effect: Set the viewport dimensions and rendering offset correctly
Fixes: gnome-shell#3068 (closed)
But is also part of the fix for gnome-shell#2087 and gnome-shell#1090
Edited by Daniel van Vugt
Fixes: gnome-shell#3068 (closed)
But is also part of the fix for gnome-shell#2087 and gnome-shell#1090