GUI.FocusControl won't work. In the attached project, there is a textField in which players will chat by typing. The problem is that the focus is lost when typing in to that textField if some other GUI pops up or is added.

This is a basic feature of chatting in game play. The game developer would like to keep this chatting window focused during player chatting.

To reproduce, play the only scene in the attached project and try typing in the textField in the center of the screen.