Add "go back" button

src/app/creator-room/creator-room.component.html

@@ -14,6 +14,9 @@
       <mat-list-item>
         <button mat-raised-button color="warn">Delete room</button>
       </mat-list-item>
+      <mat-list-item>
+        <button mat-raised-button color="primary" (click)="goBack()">Go back</button>
+      </mat-list-item>
     </div>
   </div>
 </div>

src/app/creator-room/creator-room.component.ts

@@ -3,6 +3,7 @@ import { RoomService } from '../room.service';
 import { ActivatedRoute } from '@angular/router';
 import { RoomComponent } from '../room/room.component';
 import { Room } from '../room';
+import { Location } from '@angular/common';
 
 @Component({
   selector: 'app-creator-room',
@@ -12,7 +13,8 @@ import { Room } from '../room';
 export class CreatorRoomComponent extends RoomComponent implements OnInit {
   room: Room;
   constructor(protected roomService: RoomService,
-              protected route: ActivatedRoute) {
+              protected route: ActivatedRoute,
+              private location: Location) {
     super(roomService, route);
   }
 
@@ -21,5 +23,8 @@ export class CreatorRoomComponent extends RoomComponent implements OnInit {
       this.getRoom(params['roomId']);
     });
   }
+  goBack(): void {
+    this.location.back();
+  }
 
 }