chore(*): Fix another test.

Author: MKirova

projects/igniteui-angular/src/lib/directives/for-of/for_of.directive.ts

@@ -1630,7 +1630,7 @@ export class IgxGridForOfDirective<T, U extends T[] = T[]> extends IgxForOfDirec
             if (changes[containerSize].previousValue && this.igxForScrollOrientation === "horizontal") {
                 const scrollAmount = this.scrollComponent.nativeElement["scrollLeft"];
                 this.scrollComponent.scrollAmount = scrollAmount;
-                this.onHScroll(scrollAmount);
+                this._updateScrollOffset();
             }
         }
     }

projects/igniteui-angular/src/lib/grids/grid-base.directive.ts

@@ -6312,12 +6312,8 @@ export abstract class IgxGridBaseDirective implements GridType,
         // in case state is no longer valid - update it.
         const rowForOf = row.virtDirRow;
         const gridScrLeft = rowForOf.getScroll().scrollLeft;
-        const left = -parseInt(rowForOf.dc.instance._viewContainer.element.nativeElement.style.left, 10);
-        const actualScrollLeft = left + rowForOf.getColumnScrollLeft(rowForOf.state.startIndex);
-        if (gridScrLeft !== actualScrollLeft) {
-            rowForOf.onHScroll(gridScrLeft);
-            rowForOf.cdr.detectChanges();
-        }
+        rowForOf.onHScroll(gridScrLeft);
+        rowForOf.cdr.detectChanges();
     }
 
     protected changeRowEditingOverlayStateOnScroll(row: RowType) {