Allows NLA strips to horizontally translated over each other. If a strip is dropped when translating, it'll cause the strip to shuffle into place.
---
Abstracted large conditional branch in `recalcData_nla` into it's own `nlastrip_fix_overlapping` method for increased readability. No logical changes were made.
---
[Archived Phabricator Patch](https://archive.blender.org/developer/D10102)
Pull Request: https://projects.blender.org/blender/blender/pulls/105532
8833f5dbf9