mac fix again

Author: stakira

OpenUtau/Views/PianoRollWindow.axaml

@@ -15,7 +15,7 @@
     <StyleInclude Source="/Styles/PianoRollStyles.axaml"/>
   </Window.Styles>
   <Border Grid.Row="1">
-    <Grid VerticalAlignment="Stretch" HorizontalAlignment="Stretch" Margin="{Binding $parent[2].WindowDecorationMargin}">
+    <Grid VerticalAlignment="Stretch" HorizontalAlignment="Stretch" Margin="{Binding $parent[1].WindowDecorationMargin}">
       <Grid.RowDefinitions>
         <RowDefinition Height="24"/>
         <RowDefinition Height="24"/>