Merge pull request #6087 from IgniteUI/mkirova/fix-flicker-8.2.x

chore(*): Fixing flickering test.

Author: ChronosSF

projects/igniteui-angular/src/lib/grids/grid/grid-mrl-keyboard-nav.spec.ts

@@ -3072,6 +3072,8 @@ describe('IgxGrid Multi Row Layout - Keyboard navigation #grid', () => {
         grid.navigateTo(10, col.visibleIndex);
         await wait(DEBOUNCETIME);
         fix.detectChanges();
+        await wait(DEBOUNCETIME);
+        fix.detectChanges();
 
         // cell should be at right edge of grid
         cell =  grid.getCellByColumn(10, 'City');
@@ -3085,6 +3087,8 @@ describe('IgxGrid Multi Row Layout - Keyboard navigation #grid', () => {
         grid.navigateTo(10, col.visibleIndex);
         await wait(DEBOUNCETIME);
         fix.detectChanges();
+        await wait(DEBOUNCETIME);
+        fix.detectChanges();
 
         // cell should be at left edge of grid
         cell =  grid.getCellByColumn(10, 'CompanyName');
@@ -3099,6 +3103,8 @@ describe('IgxGrid Multi Row Layout - Keyboard navigation #grid', () => {
         grid.navigateTo(9, col.visibleIndex);
         await wait(DEBOUNCETIME);
         fix.detectChanges();
+        await wait(DEBOUNCETIME);
+        fix.detectChanges();
 
         // cell should be at right edge of grid
         cell =  grid.getCellByColumn(9, 'ID');