Fixed device rotation/scaling in UI

src/Artemis.UI/Extensions/RgbRectangleExtensions.cs

@@ -0,0 +1,18 @@
+using System.Windows;
+using RGB.NET.Core;
+
+namespace Artemis.UI.Extensions
+{
+    public static class RgbRectangleExtensions
+    {
+        public static Rect ToWindowsRect(this Rectangle rectangle, double scale)
+        {
+            return new Rect(
+                (int) (rectangle.Location.X * scale),
+                (int) (rectangle.Location.Y * scale),
+                (int) (rectangle.Size.Width * scale),
+                (int) (rectangle.Size.Height * scale)
+            );
+        }
+    }
+}