Join/Unjoin Openings

After the Openings were inserted in the project with the Cut Opening solution, users can choose to join or unjoin those.

Select multiple openings and click on "Join/Unjoin Opening" to join those. If in selection there will be any previously joined openings, those will be unjoined at first.

Select one or multiple joined openings and click on "Join/Unjoin Openings" to unjoin those.