Skeleton compatibility is now bi-directional. Specifying a compatible skeleton A -> B now implies B -> A.
Skeleton compatibility is now an editor-only concern. The runtime will attempt to do the 'best it can' via name -> name mappings. Only the editor will prevent assigning incompatible skeletons in (e.g.) asset pickers etc.
Skeleton compatibility checks in editor can now be disabled in the editor preferences (and each asset picker now has a checkbox option in its view settings that allows for quick access to this).
Moves FSkeletonRemapping to its own file (which is now private).
Skeleton remappings are now generated on demand on worker threads just before animation decompression and stored in a registry, guarded by FRWScopeLock for thread-safety.
Fixed some anim BP compiler edge cases where asset references on pins were not getting preloaded correctly, causing skeletons to be erroneously reported as missing.
Exposed the current asset registry filter in SAssetView so that menu extensions can access it (and use it to provide context)
#jira UE-166054
#jira UE-167355
#rb Jurre.deBaare,John.vanderBerg
#preflight 635902602e6690262afa86f9
[CL 22878911 by Thomas Sarkanen in ue5-main branch]
The main change is that FSoftSkinVertex, used by FSkeletalMeshLODModel, in now stores weights as 16-bit after conversion from the import data. This increases the size of each FSoftSkinVertex from 144 bytes to 160 bytes (about 10% increase). By default render meshes still use 8-bit skin weights, with weights downshifted from the 16-bit modeling data, so no change in GPU memory consumption there. However, the vertex buffer will automatically return a 16-bit skin weights when requested from the GPU side (e.g. for CPU skinning and viewing tangents).
This change in the model data and vertex buffer CPU-side query, resulted in many changes throughout the codebase and will have an effect on licensees who are actively reading from and writing to these two storage locations.
The GPU skin cache shader has had one more permutation added when not using unlimited skin weights. The vertex factory is not affected.
#jira UE-164386
#rb alexis.matte, josie.yang
#preflight 632c0c5ab4515b7e22b4804d
[CL 22215219 by halfdan ingvarsson in ue5-main branch]
