No system decorations

src/PixiEditor.UI.Common/Controls/Window.axaml

@@ -9,6 +9,7 @@
         <Setter Property="FontSize" Value="{DynamicResource FontSizeNormal}" />
         <Setter Property="WindowStartupLocation" Value="CenterScreen" />
         <Setter Property="ExtendClientAreaChromeHints" Value="NoChrome" />
+        <Setter Property="SystemDecorations" Value="None"/>
         <Setter Property="ExtendClientAreaToDecorationsHint" Value="True" />
         <Setter Property="ExtendClientAreaTitleBarHeightHint" Value="36" />
         <Setter Property="Template">