when click minButton to hidden the window, then reopen,move mouse to traffic button and remove mouse, the traffic button always show RollOverImage

[surrenderios]

add the method in the INWindowButton.m can fix the problem

• (void)mouseDown:(NSEvent *)theEvent
  {
  [super mouseDown:theEvent];
  [self.group didReleaseMousePointer];
  [self updateRollOverImage];
  }