Moved brush calculation mode to the brush

This makes obviously more sense ...

Brushes/AbstractBrush.cs

@@ -1,6 +1,7 @@
 // ReSharper disable VirtualMemberNeverOverriden.Global
 
 using System.Drawing;
+using CUE.NET.Devices.Keyboard.Enums;
 using CUE.NET.Helper;
 
 namespace CUE.NET.Brushes
@@ -12,6 +13,11 @@ namespace CUE.NET.Brushes
     {
         #region Properties & Fields
 
+        /// <summary>
+        /// Gets or sets the calculation mode used for the rectangle/points used for color-selection in brushes.
+        /// </summary>
+        public BrushCalculationMode BrushCalculationMode { get; set; } = BrushCalculationMode.Relative;
+
         /// <summary>
         /// Gets or sets the overall percentage brightness of the brush.
         /// </summary>

Brushes/IBrush.cs

@@ -1,6 +1,7 @@
 // ReSharper disable UnusedMemberInSuper.Global
 
 using System.Drawing;
+using CUE.NET.Devices.Keyboard.Enums;
 
 namespace CUE.NET.Brushes
 {
@@ -9,6 +10,11 @@ namespace CUE.NET.Brushes
     /// </summary>
     public interface IBrush
     {
+        /// <summary>
+        /// Gets or sets the calculation mode used for the rectangle/points used for color-selection in brushes.
+        /// </summary>
+        BrushCalculationMode BrushCalculationMode { get; set; }
+
         /// <summary>
         /// Gets or sets the overall percentage brightness of the brush.
         /// </summary>

Devices/Keyboard/CorsairKeyboard.cs

@@ -106,11 +106,6 @@ namespace CUE.NET.Devices.Keyboard
         /// </summary>
         public int ZIndex { get; set; } = 0;
 
-        /// <summary>
-        /// Gets or sets the calculation mode used for the rectangle/points used for color-selection in brushes.
-        /// </summary>
-        public BrushCalculationMode BrushCalculationMode { get; set; } = BrushCalculationMode.Relative;
-
         /// <summary>
         /// Gets a value indicating if the keyboard has an active effect to deal with or not.
         /// </summary>
@@ -175,7 +170,7 @@ namespace CUE.NET.Devices.Keyboard
         {
             try
             {
-                switch (BrushCalculationMode)
+                switch (brush.BrushCalculationMode)
                 {
                     case BrushCalculationMode.Relative:
                         RectangleF brushRectangle = RectangleHelper.CreateRectangleFromRectangles(keys.Select(x => x.KeyRectangle));