As the base game doesn’t feature asymmetric portals (in fact it does: Tall Clay Window is asymmetric, but it’s barely noticeable) this wasn’t an issue, but my mod adds windows with shutters outside. In most cases everything went well but when I decided to use free wall tool or add an inside patio as a room the shutters were placed at the wrong side of the wall.
Therefore I humbly ask for implementing an ability to rotate doors and windows by 180° in Build Mode.