Opening a new main window for some tag selection

If you are working on a list of notes (have certain tags selected) and want to have a look at a different list of notes (e.g. what task have already been done in that context - or whatsoever) it would be convenient to quickly open a new main window with a certain tag selected.

So my suggestion is to have a context menu entry after a right click on a tag to open a new main window and have this tag preselected (without changing the tag selection of the initial main window).