fix(grid): Stop propagation once handleNavigation is called 10074

Author: Vasil Mihalkov

projects/igniteui-angular/src/lib/grids/grid-navigation.service.ts

@@ -50,6 +50,7 @@ export class IgxGridNavigationService {
     constructor(protected platform: PlatformUtil) { }
 
     handleNavigation(event: KeyboardEvent) {
+        event.stopPropagation();
         const key = event.key.toLowerCase();
         if (this.grid.crudService.cell && NAVIGATION_KEYS.has(key)) {
             return;