Gradient editor - Delete stops with DEL key

Surface editor - Fixed editor taking focus on mouse over

src/Artemis.UI.Shared/Screens/GradientEditor/GradientEditorView.xaml

@@ -39,6 +39,9 @@
             </VisualBrush.Visual>
         </VisualBrush>
     </UserControl.Resources>
+    <UserControl.InputBindings>
+        <KeyBinding Key="Delete" Command="{s:Action RemoveColorStop}" CommandParameter="{Binding SelectedColorStopViewModel}"/>
+    </UserControl.InputBindings>
     <Grid Margin="16">
         <Grid.RowDefinitions>
             <RowDefinition Height="*" />

src/Artemis.UI/Screens/SurfaceEditor/SurfaceEditorViewModel.cs

@@ -281,7 +281,6 @@ namespace Artemis.UI.Screens.SurfaceEditor
         // ReSharper disable once UnusedMember.Global - Called from view
         public void EditorGridMouseMove(object sender, MouseEventArgs e)
         {
-            ((Grid) sender).Focus();
             // If holding down Ctrl, pan instead of move/select
             if (IsPanKeyDown())
             {