Device visualizer - Added LedClicked event

Device properties - Added the ability to select LEDs by clicking on them in the preview

src/Artemis.Core/Extensions/RgbDeviceExtensions.cs

@@ -25,10 +25,10 @@ namespace Artemis.Core
         public static SKRect ToSKRect(this Rectangle rectangle)
         {
             return SKRect.Create(
-                (float) rectangle.Location.X,
-                (float) rectangle.Location.Y,
-                (float) rectangle.Size.Width,
-                (float) rectangle.Size.Height
+                rectangle.Location.X,
+                rectangle.Location.Y,
+                rectangle.Size.Width,
+                rectangle.Size.Height
             );
         }
     }

src/Artemis.Core/Models/Surface/ArtemisDevice.cs

@@ -337,6 +337,7 @@ namespace Artemis.Core
 
             Layout = layout;
             Layout.ApplyDevice(this);
+            CalculateRenderProperties();
             OnDeviceUpdated();
         }