Yes! I've been looking for this feature and it's been requested for a multitude of times, but never seen any traction in any conversation. I don't get how this is NOT a feature yet, since all our docks are fighting over real-estate in the OBS application window and merging docks is a primo way to save space.
This should not be so hard to add a hook and handler in the API. There's already ways to set/remove docks, but nothing on their tabbing/ merging behaviour.
