Resolve "Include dynamic titles in app bar of new SPA"

Closes #859 (closed)

aleksis/core/frontend/components/app/App.vue

@@ -25,7 +25,7 @@
           class="white--text text-decoration-none"
           @click="$router.push({ name: 'dashboard' })"
         >
-          {{ systemProperties.sitePreferences.generalTitle }}
+          {{ $root.toolbarTitle }}
         </v-toolbar-title>
 
         <v-progress-linear