Fix: correctly update Actions when renaming/re-typing a custom property
When renaming a custom property on a data-block, only update the
animation in a slot for that data-block. Previously all F-Curves were
updated, even when they were meant for other data-blocks.
This also handles the cases where the type of a custom property is
changed, and not just its name.
This is part of #146586
Pull Request: https://projects.blender.org/blender/blender/pulls/146979
acde9be6fd