The selected JInternalFrame loses focus when closing an
unselected JinternalFrame - no JinternalFrame has focus afterwards.

Using Swing 1.0.1 and JDK 1.1.5 - see attached test case.

To Reproduce: Open more than one JInternalFrame then close one of the
unselected frames using the Close system menu item or the Close
upper-right button. Afterwards, none of the other JInternalFrames have
focus. The JInternalFrame that did have focus should still have it.