When performing a click and drag from the address bar we can create a shortcut of the current folder.
I see that when you do this you are prevented from dropping that shortcut in to the source Lister. I assume this is to prevent accidental shortcut creation.
However you are able to drop the shortcut on the to folder in the address bar. I find I accidentally do this a do this a bit when clicking on the address bar. It happens when I mess up clicking and moving the mouse, I must do a little drag while clicking (I use a trackball).
Could you add similar logic to prevent dropping a shortcut on the the source address bar as you have with the source Lister?