add duplicate global action too

Author: heartacker

src/Views/Preferences.axaml

@@ -600,7 +600,7 @@
 
                 <Rectangle Grid.Row="1" Height="1" Fill="{DynamicResource Brush.Border2}" HorizontalAlignment="Stretch" VerticalAlignment="Bottom"/>
 
-                <Grid Grid.Row="2" ColumnDefinitions="Auto,Auto,*,Auto,Auto" Background="{DynamicResource Brush.ToolBar}">
+                <Grid Grid.Row="2" ColumnDefinitions="Auto,Auto,Auto,*,Auto,Auto" Background="{DynamicResource Brush.ToolBar}">
                   <Button Grid.Column="0"
                           Classes="icon_button"
                           Width="28" Height="28"
@@ -613,14 +613,20 @@
                           Click="OnRemoveSelectedCustomAction">
                     <Path Width="14" Height="14" Data="{StaticResource Icons.Minus}"/>
                   </Button>
-                  <Button Grid.Column="3"
+                  <Button Grid.Column="2"
+                          Classes="icon_button"
+                          Width="28" Height="28"
+                          Click="OnDuplicateSelectedCustomAction">
+                    <Path Width="14" Height="14" Data="{StaticResource Icons.Copy}"/>
+                  </Button>
+                  <Button Grid.Column="4"
                           Classes="icon_button"
                           Width="28" Height="28"
                           Click="OnMoveSelectedCustomActionUp"
                           IsVisible="{Binding #ThisControl.SelectedCustomAction, Converter={x:Static ObjectConverters.IsNotNull}}">
                     <Path Width="14" Height="14" Margin="0,6,0,0" Data="{StaticResource Icons.Up}"/>
                   </Button>
-                  <Button Grid.Column="4"
+                  <Button Grid.Column="5"
                           Classes="icon_button"
                           Width="28" Height="28"
                           Click="OnMoveSelectedCustomActionDown"

src/Views/Preferences.axaml.cs

@@ -455,6 +455,22 @@ private void OnRemoveSelectedCustomAction(object sender, RoutedEventArgs e)
             e.Handled = true;
         }
 
+        private void OnDuplicateSelectedCustomAction(object sender, RoutedEventArgs e)
+        {
+            if (SelectedCustomAction == null)
+                return;
+
+            var action = new Models.CustomAction(SelectedCustomAction)
+            {
+                Name = SelectedCustomAction.Name + "(Duplicated)"
+            };
+
+            ViewModels.Preferences.Instance.CustomActions.Add(action);
+            SelectedCustomAction = action;
+
+            e.Handled = true;
+        }
+
         private void OnMoveSelectedCustomActionUp(object sender, RoutedEventArgs e)
         {
             if (SelectedCustomAction == null)