initEditMode() {
   if (!this.editModeInitiated) {
     this.editModeInitiated = true;
     this.events.emit('init-edit-mode', null);
     this.maxPanelsPerRowOptions = getFactors(GRID_COLUMN_COUNT);
   }
 }

 panelUpgrades.push(panel => {
   if (panel.minSpan) {
     const max = GRID_COLUMN_COUNT / panel.minSpan;
     const factors = getFactors(GRID_COLUMN_COUNT);
     // find the best match compared to factors
     // (ie. [1,2,3,4,6,12,24] for 24 columns)
     panel.maxPerRow =
       factors[
         _.findIndex(factors, o => {
           return o > max;
         }) - 1
       ];
   }
   delete panel.minSpan;
 });

 it('should return factors for 12', () => {
   const factors = getFactors(12);
   expect(factors).toEqual([1, 2, 3, 4, 6, 12]);
 });