There were three methods with succinct but slightly unclear names:
- Action::slot_move()
- Channelbag::channel_group_move()
- Channelbag::fcurve_move()
The ambiguity is due to other functions with similar names that e.g.
move fcurves *between* Channelbags, etc. Whereas these methods only move
items to other positions within the array they're already in.
To make this clearer, this PR adds `_to_index` to the end of these
array-oriented methods.
Pull Request: https://projects.blender.org/blender/blender/pulls/133730
77f4fd2637