Data bindings - Fix crash when removing color gradient stops

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

@@ -295,7 +295,7 @@ namespace Artemis.UI.Shared
         {
             Execute.PostToUIThread(SetupForDevice);
         }
-        
+
         private void Render()
         {
             DrawingContext drawingContext = _backingStore.Open();

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

@@ -51,7 +51,6 @@ namespace Artemis.UI.Shared
             byte g = Led.RgbLed.Color.GetG();
             byte b = Led.RgbLed.Color.GetB();
 
-            _renderColor.A = (byte) (isDimmed ? 100 : 255);
             _renderColor.A = isDimmed ? Dimmed : NonDimmed;
             _renderColor.R = r;
             _renderColor.G = g;