Fixed the display issue in AOT mode

src/Calculator/App.xaml

@@ -333,7 +333,6 @@
 
             <FontFamily x:Key="CalculatorFontFamily">ms-appx:///Assets/CalculatorIcons.ttf#Calculator Fluent Icons</FontFamily>
 
-            <x:Double x:Key="SplitViewOpenPaneLength">256</x:Double>
             <Thickness x:Key="PivotPortraitThemePadding">0,1,0,0</Thickness>
             <x:Double x:Key="PivotHeaderItemFontSize">14</x:Double>
             <FontWeight x:Key="PivotHeaderItemThemeFontWeight">Normal</FontWeight>

src/Calculator/Views/MainPage.xaml

@@ -101,7 +101,7 @@
                              ItemInvoked="OnNavItemInvoked"
                              Loaded="OnNavLoaded"
                              MenuItemsSource="{x:Bind CreateUIElementsForCategories(Model.Categories), Mode=OneWay}"
-                             OpenPaneLength="{StaticResource SplitViewOpenPaneLength}"
+                             OpenPaneLength="{x:Bind NavigationViewOpenPaneLength(Model.IsAlwaysOnTop), Mode=OneWay}"
                              PaneClosed="OnNavPaneClosed"
                              PaneOpened="OnNavPaneOpened"
                              SelectionChanged="OnNavSelectionChanged"

src/Calculator/Views/MainPage.xaml.cs

@@ -604,6 +604,11 @@ namespace CalculatorApp
             }
         }
 
+        private double NavigationViewOpenPaneLength(bool isAlwaysOnTop)
+        {
+            return isAlwaysOnTop ? 0 : 256;
+        }
+
         private CalculatorApp.Calculator m_calculator;
         private GraphingCalculator m_graphingCalculator;
         private CalculatorApp.UnitConverter m_converter;