 <span class="keysym">Control+</span> left mouse click will call f_CleanRestoreWorkspace function.
  This will iconify and put into invisible group all iconified windows on the active page.
  Repeating this action once again, restores all iconified windows back in place quickly
  and without animation. Windows which were iconified before calling this action or from
  windows started and iconified after this action are not affected by this function. This
  is NsCDE smart version of the "show desktop" functio