Blender Git Commit Log

VSE: Fix animation duplication in split operator

Due to misunderstanding of how strip duplication works, animation data
was duplicated on all strips when any strip was split.

`SEQ_sequence_base_dupli_recursive()` duplicated data on strip that was
being split, and `SEQ_ensure_unique_name()` duplicated animation on all
strips.

Only duplication should be done with `SEQ_ensure_unique_name()` and only
on right side split strips, because only these strips are duplicated.