3fbb640418
With 4c67c78452 we changed the default theme color for front faces,
used by the Face Orientation overlay, to have zero alpha so that it
could be used in more cases. But versioning updated this for all old
files, which can overwrite users who made deliberate changes to it.
This PR alters the versioning code to only change the color if it
currently exactly matches the old default.
Pull Request: https://projects.blender.org/blender/blender/pulls/135262