31fd540048
Refactor `ED_curve_updateAnimPaths()` and the static functions it calls, separating out: - the manipulation of the F-Curves themselves, and - the manipulation of whatever container holds those F-Curves. This will make it considerably easier to convert the code to deal with a `Span<FCurve *>` later instead of `ListBase`, which in turn is necessary to handle layered Actions. The old code used to move F-Curves from one `ListBase` to another, to avoid visiting the same F-Curve twice. This is now done by tracking those F-Curves in a `Set<FCurve *>`, so that it doesn't require manipulation of the storage itself. No functional changes.
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