Beautify skeleton loader in sidenav menu

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

@@ -57,7 +57,7 @@
         </div>
       </v-list-item-group>
       <template v-else>
-        <v-skeleton-loader class="ma-2" type="list-item-avatar@5" />
+        <v-skeleton-loader class="ma-2" type="list-item@5" />
       </template>
     </v-list>