Refactor WebComponent and iframing to be mutually exclusive, strip old app

src/app/dashboard/dashboard.component.html

@@ -4,11 +4,14 @@
     <div [ngClass]="{ 'hide-attribute': hide_messages }" class="tfw-messages"><app-messages></app-messages></div>
     <div class="tfw-web tao-grid-top-left"
          [ngClass]="{ 'deploy-blur': deploying }">
-      <div class="iframe-container">
-        <iframe class="iframe"
-                scrolling="yes" frameborder="0"
-                src="about:blank"></iframe>
-      </div>
+         <app-web *ngIf="!iframeUrl"></app-web>
+         <div *ngIf="iframeUrl" class="iframe-container">
+          <iframe class="iframe"
+                  scrolling="yes"
+                  frameborder="0"
+                  [src]="iframeUrl | safe">
+          </iframe>
+        </div>
     </div>
     <div class="tfw-ide">
       <app-ide></app-ide>

src/app/dashboard/dashboard.component.ts

@@ -16,6 +16,7 @@ export class DashboardComponent implements OnInit, OnDestroy {
   deploymentNotificationSubscription: Subscription;
   layout: string = config.dashboard.currentLayout;
   hide_messages: boolean = config.dashboard.hide_messages;
+  iframeUrl: string = config.dashboard.iframeUrl;
   command_handlers = {'layout':          this.layoutHandler.bind(this),
                       'reload_frontend': this.reloadFrontendHandlder.bind(this)};