Move merge with below button to the right

src/PixiEditor/Views/UserControls/Layers/LayersManager.xaml

@@ -55,8 +55,8 @@
                 </Button>
                 <Button 
                     Command="{commands:Command PixiEditor.Layer.MergeWithBelow}" Height="24" Width="24" ToolTip="Merge with below" Cursor="Hand"
-                    HorizontalAlignment="Stretch" Margin="0,0,5,0"
-                    DockPanel.Dock="Left"
+                    DockPanel.Dock="Right"
+                    HorizontalAlignment="Stretch" Margin="5,0,0,0"
                     Style="{StaticResource ToolButtonStyle}">
                     <Button.Background>
                         <ImageBrush ImageSource="/Images/Merge-downwards.png"/>