Hi Mr. Yuri,

re:
> Michael, I think it would be great shortcut if (when having split view) right-click on viewport
> (top/bottom, right/left, back/front) would cause just flip that viewport view.

Right click in a viewport is already used for a different function than that - when you are not in a command a right click in a viewport will repeat the last command and if you are in a command it is a shortcut for the "Done" button.

EDIT: Oops sorry I thought you meant a right click inside the viewport itself but I think I figured out you mean a right click on the view tab control. That should be fine for the default behavior.

- Michael