Device visualizer - Clear device cache on UI thread on property change

Surface editor - Don't quietly fail device updates

src/Artemis.UI.Shared/Controls/DeviceVisualizer.cs

@@ -197,9 +197,12 @@ public class DeviceVisualizer : Control
 
     private void DevicePropertyChanged(object? sender, PropertyChangedEventArgs e)
     {
-        if (Device != null)
+        Dispatcher.UIThread.Invoke(async () =>
-            BitmapCache.Remove(Device);
+        {
-        Dispatcher.UIThread.Invoke(SetupForDevice, DispatcherPriority.Background);
+            if (Device != null)
+                BitmapCache.Remove(Device);
+            await SetupForDevice();
+        }, DispatcherPriority.Background);
     }
 
     private void DeviceUpdated(object? sender, EventArgs e)

src/Artemis.UI/Screens/SurfaceEditor/SurfaceEditorViewModel.cs

@@ -136,6 +136,10 @@ public class SurfaceEditorViewModel : ActivatableViewModelBase, IMainScreenViewM
                 _saving = true;
                 _rgbService.SaveDevices();
             }
+            catch (Exception e)
+            {
+                _windowService.ShowExceptionDialog("Failed to update device positions", e);
+            }
             finally
             {
                 _saving = false;