Blender Git Loki

Fix missing animation UI update in the Properties Editor

Animation indicators as well as decorators for properties were not
updating correctly in the following cases:
- NLA pushdown (this was reported in T87681)
- NLA enter/exit tweakmode
- Outliner unlinking/setting action

These actions all send a ND_NLA_ACTCHANGE notifier which the Properties
Editor was not listening to [which is now added].

part of T87681.

Maniphest Tasks: T87681

Differential Revision: https://developer.blender.org/D11040