title: Angular 2 router navigate '../' moves to the root state instaed of the parent
body: <p>I have layout: '/home', 2 pages: '/home/sample/list' and '/home/sample/details' and their layout: '/home/sample'. I'm trying to navigate to the parent state from '/home/sample/details' to '/home/sample' and then redirect to '/home/sample/list'. But when I try to use smth like '../' it moves me to the '/home'. What I'm doing wrong?</p>
  
  <pre><code>const appRoutes: Routes = [
      { path: '', redirectTo: '/home', pathMatch: 'full' },
      { path: 'home', component: HomeComponent, children: [
         { path: 'sample', component: SampleComponent, children: [
            { path: '', redirectTo: 'list', pathMatch: 'full' },
            { path: 'details', component: SampleDetailsComponent },
            { path: 'list', component: SampleListComponent },
         ]}
      ] },
      { path: '**', component: PageNotFoundComponent }
  ];
  </code></pre>
  
  <p>After user click on a button I want to return him to the parent state (like a back button)</p>
  
  <pre><code>this.router.navigate(['../']);
  </code></pre>