Function clickUndo

src/js/method-draw.js:758–763

()

    }
    
    var clickUndo = function(){
      if (undoMgr.getUndoStackSize() > 0) {
        flash($('#edit_menu'));
        undoMgr.undo();
      }
    };
  
    var clickRedo = function(){
      if (undoMgr.getRedoStackSize() > 0) {