Implemented layer elements

Added a brush layer element
Corsair - Added ST100 RGB layout

src/Artemis.UI/Converters/ColorToDrawingColorConverter.cs

@@ -0,0 +1,33 @@
+using System;
+using System.Drawing;
+using System.Globalization;
+using System.Windows.Data;
+
+namespace Artemis.UI.Converters
+{
+    /// <inheritdoc />
+    /// <summary>
+    ///     Converts <see cref="T:System.Drawing.Color" /> into <see cref="T:System.Windows.Media.Color" />.
+    /// </summary>
+    [ValueConversion(typeof(Color), typeof(System.Windows.Media.Color))]
+    public class ColorToDrawingColorConverter : IValueConverter
+    {
+        /// <inheritdoc />
+        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            if (value is Color drawingColor)
+                return System.Windows.Media.Color.FromArgb(drawingColor.A, drawingColor.R, drawingColor.G, drawingColor.B);
+
+            return default(System.Windows.Media.Color);
+        }
+
+        /// <inheritdoc />
+        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            if (value is System.Windows.Media.Color mediaColor)
+                return Color.FromArgb(mediaColor.A, mediaColor.R, mediaColor.G, mediaColor.B);
+
+            return default(Color);
+        }
+    }
+}