Please make new bones update blend profiles and masks automatically

Steps to Reproduce

  1. Import UE5 Manny fbx file
  2. Create a blend profile or mask and set non-default value on spine_01, e.g. 0.565
  3. Modify the fbx file to add spine_new under spine_01, export it
  4. Reimport UE5 Manny from the fbx we just exported
  5. Check the blend profile or mask that you added, spine_new will have a default weight, and not 0.565

Expected: spine_new is imported with 0.565 to match it’s parent.