wrapped custom widget items in containers so we have more control of the surrounding, i.e. divider

Hyperbar.Windows.MediaController/MediaControllerWidgetViewModel.cs

@@ -0,0 +1,12 @@
+namespace Hyperbar.Windows.Primary;
+
+public class MediaControllerWidgetViewModel(ITemplateFactory templateFactory,
+    IServiceFactory serviceFactory,
+    IMediator mediator,
+    IEnumerable<MediaControllerViewModel> items) :
+    ObservableCollectionViewModel<MediaControllerViewModel>(serviceFactory, mediator, items),
+    IWidgetViewModel,
+    ITemplatedViewModel
+{
+    public ITemplateFactory TemplateFactory => templateFactory;
+}