Layers - Seperated activation and removal of layers/effects

Effects - Added effects UI, order is still a bit messed up and reordering is missed
Effects - Added renaming of effects on the layer

src/Artemis.UI/Behaviors/MouseBehaviour.cs

@@ -0,0 +1,39 @@
+using System.Windows;
+using System.Windows.Input;
+
+namespace Artemis.UI.Behaviors
+{
+    public class MouseBehaviour
+    {
+        public static readonly DependencyProperty MouseUpCommandProperty =
+            DependencyProperty.RegisterAttached("MouseUpCommand", typeof(ICommand),
+                typeof(MouseBehaviour), new FrameworkPropertyMetadata(
+                    MouseUpCommandChanged));
+
+        public static void SetMouseUpCommand(UIElement element, ICommand value)
+        {
+            element.SetValue(MouseUpCommandProperty, value);
+        }
+
+        public static ICommand GetMouseUpCommand(UIElement element)
+        {
+            return (ICommand) element.GetValue(MouseUpCommandProperty);
+        }
+
+        private static void MouseUpCommandChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
+        {
+            var element = (FrameworkElement) d;
+
+            element.MouseUp += element_MouseUp;
+        }
+
+        private static void element_MouseUp(object sender, MouseButtonEventArgs e)
+        {
+            var element = (FrameworkElement) sender;
+
+            var command = GetMouseUpCommand(element);
+
+            command.Execute(e);
+        }
+    }
+}