chore(*): Add activation/selection changeDetected for tests.

Author: MKirova

projects/igniteui-angular/src/lib/test-utils/helper-utils.spec.ts

@@ -28,6 +28,8 @@ export let gridsubscriptions: Subscription [] = [];
 export const setupGridScrollDetection = (fixture: ComponentFixture<any>, grid: GridType) => {
     gridsubscriptions.push(grid.verticalScrollContainer.chunkLoad.subscribe(() => fixture.detectChanges()));
     gridsubscriptions.push(grid.parentVirtDir.chunkLoad.subscribe(() => fixture.detectChanges()));
+    gridsubscriptions.push(grid.activeNodeChange.subscribe(() => grid.cdr.detectChanges()));
+    gridsubscriptions.push(grid.selected.subscribe(() => grid.cdr.detectChanges()));
 };
 
 export const setupHierarchicalGridScrollDetection = (fixture: ComponentFixture<any>, hierarchicalGrid: IgxHierarchicalGridComponent) => {