anchor.diff:  .palette div#delete-drop.hover {
       background-color: #f99;
       cursor: pointer;
  +}
  +
  +.counter.hover {
  +    background-color: #f99;
   }
   
   .palette .tip {
  
positive.code:             executeUpdateDetails(input)
          })
      })
  }
  
  function updateAddActivityButton() {
  
negative.code:                     accept: ['marker', 'new-marker'],
                      hoverclass: 'hover',
                      onDrop: moveMarker })
                      registerHoverTip(item, "Click the grid cell to add an activity for all subjects")
              }
              );
  
  