More notifier cleanups:
NC_SCENE|ND_OB_SELECT : scene level object selections changed
NC_SCENE|ND_OB_ACTIVE : scene level, new active object
NC_OBJECT|ND_BONE_SELECT : object level, bone selection changed
NC_OBJECT|ND_BONE_ACTIVE: object level, new active bone
I've made view3d listen to these, so operators that change
selections don't have to tag own region for redraw anymore.
Also enabled selecting/activating in outliner again.
BTW: Added it in space_action, but Joshua has to code the
proper refresh still :)
1580b6bc17