Fixed handling of keyEvent. If a KeyEvent is received, and the processing for...

Fixed handling of keyEvent.  If a KeyEvent is received, and the processing for the event (such as running a macro) calls QApplication::processEvents(), ::keyEvent() may be called AGAIN from QApplication::processEvents() before the original KeyEvent's processing has completed.  So, when a KeyEvent is received, ignore any other KeyEvents until the original one has completed.