Switched to new permission handling for front and backend as the moonlight core did

MoonlightServers.Frontend/UI/Views/Admin/Nodes/Index.razor

@@ -15,6 +15,8 @@
 @inject AlertService AlertService
 @inject ToastService ToastService
 
+@attribute [Authorize(Policy = "permissions:admin.servers.nodes.get")]
+
 <div class="mb-3">
     <NavTabs Index="2" Names="@UiConstants.AdminNavNames" Links="@UiConstants.AdminNavLinks"/>
 </div>