chore(*): Fix test timing.

Author: MKirova

projects/igniteui-angular/src/lib/grids/grid/grid-filtering-ui.spec.ts

@@ -2600,7 +2600,7 @@ describe('IgxGrid - Filtering Row UI actions #grid', () => {
         }));
 
         it('should position filter row and chips correctly when grid has column groups and one is hidden.',
-            fakeAsync(() => {
+            (async() => {
                 const filteringExpressionsTree = new FilteringExpressionsTree(FilteringLogic.And, 'ProductName');
                 const expression = {
                     fieldName: 'ProductName',
@@ -2622,7 +2622,8 @@ describe('IgxGrid - Filtering Row UI actions #grid', () => {
 
                 GridFunctions.clickFilterCellChip(fix, 'AnotherField');
                 fix.detectChanges();
-
+                await wait(30);
+                fix.detectChanges();
                 // check if it is positioned at the bottom of the thead.
                 const theadWrapper = grid.theadRow.nativeElement.firstElementChild;
                 const filteringRow = fix.debugElement.query(By.directive(IgxGridFilteringRowComponent));
@@ -5450,7 +5451,7 @@ describe('IgxGrid - Filtering actions - Excel style filtering #grid', () => {
             fix.detectChanges();
             expect(listItems[0].classList.contains("igx-list__item-base--active")).toBeFalse();
             expect(listItems[1].classList.contains("igx-list__item-base--active")).toBeTrue();
-            
+
             // on arrow up the first item should be active again
             UIInteractions.triggerKeyDownEvtUponElem('arrowup', list, true);
             fix.detectChanges();