Blender Git Loki

Bugfixes:

* #19459: Shape Keys not Animateable
Shape Keys were missing the appropriate 'path' callbacks.

* #19458: 3D Viewport doesn't refresh when adding new bone in editmode (using Shift-A)
The 'wrong' notifier was being sent. Currently, Armature EditMode only responds to NC_OBJECT|ND_TRANSFORM, which isn't strictly that correct for all cases.

* Alignment code for constraints headers (i.e. enable/disable lumped with the delete constraint button) was causing the delete button to not work anymore. Removed the offending code (it shouldn't have been there to start off with).

* When object's don't have their own AnimData (i.e. if you only animate the values of some shapekeys), a space is no longer left beside the object's name for a visibility toggle in the Graph Editor.