[player] Add missing gridRowStart style for dynamic elements

projects/player/src/app/components/section/section.component.html

@@ -29,6 +29,7 @@
          [style.margin-bottom.px]="element.marginBottom"
          [style.grid-column-start]="element.gridColumnStart"
          [style.grid-column-end]="element.gridColumnEnd"
+         [style.grid-row-start]="element.gridRowStart"
          [style.grid-row-end]="element.gridRowEnd">
       <app-element-overlay
           [elementModel]="element"