Revert "JS: delete unused method 'showWindows' for GUIFrame"
Revert "JS: delete unused method 'showWindows' for GUIFrame"

This reverts commit 954d2d7325814c1e5cb37223b521786352a2cb42.

For some reason, updateUI does not always move the tool and view windows
to front when JaamSim is de-iconified or clicked. The 'showWindows' method
ensures that this is always done.

Signed-off-by: Harry King <409587b9e6671aa0763646191d292852dc49a658@gmail.com>

jaamsim/jaamsim,jaamsim/jaamsim,jaamsim/jaamsim,jaamsim/jaamsim