Between the configurations could add an option that causes that after opening a certain amount of windows/programs (depending on if the window grouping is activated) are hidden the new windows/programs that are opening and can only be shown through a button (would work similarly as when in Mousepad many tabs are opened and do not fit the names of all the files on the screen). Another condition could be that the window buttons reach a minimum width in pixels before this work.
This feature could be very useful for saving space in netbooks or other devices with small screens and possibly also the bug 7367 would be solved.