docs: public boolean onDelete()
      {
          if (this.getEditing() == false)
          {   // Can't delete on a disabled grid.
              String strError = "Can't Delete from disabled grid";
              if (this.getTask() != null)
                  if (this.getTask().getApplication() != null)
                      strError = ((BaseApplication)this.getTask().getApplication()).getResources(ResourceConstants.ERROR_RESOURCE, true).getString(strError);
              this.displayError(strError);
              return false;
          }
          return super.onDelete();
      }