The closest I've ever come to this is hacky at best, so take this for what it is...
Creating AL constraint while not holding Option:

Creating AL constraint while holding option:

In IB if you hold Option while creating the AL constraint, it toggles whether the constraint binds to a margin or not. That's one convenient way to avoid re-editing the constraint. Further (and this is the hacky part because I can't explain it) I've noticed that in projects where I start holding option and binding AL constraints without the margin, that behavior becomes the default!
Like I said, it's hacky and I can't explain it why the default changes sometimes, but holding Option when you create constraints is the closest I've ever gotten.