Fixed typo.

   *                           state can be reset after the IpceMainWindow::show() causes resize and

   *                           move events which in turn cause the project clean flag to be false

   *                           even though the project has just opened.

   *   @history 2018-07-09 Kaitlyn Lee - Changed removeView() to delete the parent dock widget. If we do

   *                           not delete the dock widget, an empty dock widget will remain where the

   *   @history 2018-07-09 Kaitlyn Lee - Added tileViews() and the menu option to tile all docked/undocked

   *                           and tabbed/untabbed views. Changed removeView() to delete the parent dock widget.

   *                           If we do not delete the dock widget, an empty dock widget will remain where the

   *                           view used to be.

   */

  class IpceMainWindow : public QMainWindow {