FreeStyle line styles were not part of the dependency graph, and blacklisted from the Copy-on-Write system. As a result, animated FreeStyle properties would not be updated by the animation system, resulting in T72213. There was an explicit call to run the animation system on the original datablocks, but that was (for good reasons) removed in D5394.
This commit adds the FreeStyleLineStyle datablocks to the dependency graph and allows them to be handled by the CoW system. As a result
- the UI now updates properly when properties are animated, and
- animated property values are actually used when rendering.