[frontend] Fixes in twitter platform module

kibicara-frontend/src/app/platforms/twitter/twitter-callback/twitter-callback.component.ts

@@ -31,6 +31,14 @@ export class TwitterCallbackComponent implements OnInit {
             this.route.snapshot.queryParams['hood'],
           ]);
         });
+    } else if (
+      this.route.snapshot.queryParams['hood'] &&
+      this.route.snapshot.queryParams['denied']
+    ) {
+      this.router.navigate([
+        '/dashboard/hoods',
+        this.route.snapshot.queryParams['hood'],
+      ]);
     } else {
       this.router.navigate(['/404']);
     }

kibicara-frontend/src/app/platforms/twitter/twitter-settings/twitter-settings.component.html

@@ -23,7 +23,7 @@
         </button>
         <mat-divider></mat-divider>
       </mat-list-item>
-      <mat-list-item *ngFor="let twitter of twitters">
+      <mat-list-item *ngFor="let twitter of twitters | twitterCorpses">
         <div class="entry">
           @{{ twitter.username }}
           <mat-slide-toggle