add to app nav

Author: andrewseguin

src/e2e-app/e2e-app/e2e-app-layout.html

@@ -31,6 +31,7 @@
   <a mat-list-item [routerLink]="['mdc-menu']">MDC Menu</a>
   <a mat-list-item [routerLink]="['mdc-radio']">MDC Radio</a>
   <a mat-list-item [routerLink]="['mdc-slide-toggle']">MDC Slide Toggle</a>
+  <a mat-list-item [routerLink]="['mdc-slider']">MDC Slider</a>
   <a mat-list-item [routerLink]="['mdc-tabs']">MDC Tabs</a>
   <a mat-list-item [routerLink]="['mdc-progress-bar']">MDC Progress bar</a>
 </mat-nav-list>