Request

Lock on constraint transform space so you change one target and both targets would change (target and source).

Describe the solution you'd like

It is rare I use two spaces on the same constraint and often looks and feels like it's broken as soon as you swap one of the spaces and not the other - best to make it look like it's working by having them locked/mirrored on default. By adding a little lock icon between them, you can toggle one space and the other will toggle also to the same target space.