behaviour: Clean up BehaviourOpacity
behaviour: Clean up BehaviourOpacity

• Use a consistent coding style

• Call set_bounds() from set_property(), because we need proper
  notification on the modified property

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