Override the opacity when painting a clone instead of combining
Override the opacity when painting a clone instead of combining

When rendering a clone before this commit the clone's opacity was
combined with the opacity of the source but this is not usually the
desired effect. Instead the clone's opacity (combined with its
parents) should completely override the opacity of the source.

Distrotech/clutter,ebassi/clutter,GNOME/clutter,jigpu/clutter,tardyp/clutter,djdeath/clutter-multithreaded,GNOME/clutter,djdeath/clutter,rkudiyarov/clutter_osx,rkudiyarov/clutter_osx,GNOME/clutter,collects/clutter,collects/clutter,nobled/clutter,heysion/clutter-clone,heysion/clutter-clone,collects/clutter,djdeath/clutter-multithreaded,nobled/clutter,spatulasnout/clutter,jigpu/clutter,dlespiau/clutter,Distrotech/clutter,kerrickstaley/clutter-vala,djdeath/clutter,Distrotech/clutter,djdeath/clutter-android,spatulasnout/clutter,heysion/clutter-clone,dlespiau/clutter,ebassi/clutter,djdeath/clutter,kerrickstaley/clutter-vala,djdeath/clutter-multithreaded,kerrickstaley/clutter-vala,ebassi/clutter,djdeath/clutter-multithreaded,spatulasnout/clutter,kerrickstaley/clutter-vala,GNOME/clutter,tardyp/clutter,spatulasnout/clutter,djdeath/clutter-android,ebassi/clutter,tardyp/clutter,rkudiyarov/clutter_osx,jigpu/clutter,jigpu/clutter,GNOME/clutter,Distrotech/clutter,jigpu/clutter,djdeath/clutter-android,djdeath/clutter,jigpu/clutter,djdeath/clutter-android,nobled/clutter,spatulasnout/clutter,djdeath/clutter,collects/clutter,heysion/clutter-clone,collects/clutter,dlespiau/clutter,djdeath/clutter,heysion/clutter-clone,rkudiyarov/clutter_osx,Distrotech/clutter,Distrotech/clutter,djdeath/clutter-android,ebassi/clutter