Fix's Skeletal mesh import scale issue common with importing from blender, due to the scale difference of UE CM vs Blender Meters.
Also allows you to rescale your skeleton and all its mesh's while keeping a uniform root bone scale of 1.0.
If the root isn't scaled to 1.0 it can cause issues with creating and editor physics assets and becomes a hassle to deal with in animations and object bounds.
Update 09-01-2023: Added 5.1 support