Update MainWindow.xaml

Author: ghost1372

dev/DevWinUI.Gallery/Views/MainWindow.xaml

@@ -18,22 +18,20 @@
                   IsBackButtonVisible="True"
                   IsPaneToggleButtonVisible="True"
                   Subtitle="{x:Bind dev:ProcessInfoHelper.VersionWithPrefix}">
-            <TitleBar.Content>
-                <AutoSuggestBox x:Name="HeaderAutoSuggestBox"
-                                MinWidth="320"
-                                VerticalAlignment="Center"
-                                PlaceholderText="Search"
-                                QueryIcon="Find"
-                                QuerySubmitted="OnQuerySubmitted"
-                                TextChanged="OnTextChanged">
-                    <AutoSuggestBox.KeyboardAccelerators>
-                        <KeyboardAccelerator Key="F"
-                                             Invoked="KeyboardAccelerator_Invoked"
-                                             Modifiers="Control" />
-                    </AutoSuggestBox.KeyboardAccelerators>
-                </AutoSuggestBox>
-            </TitleBar.Content>
-            <TitleBar.Footer>
+            <AutoSuggestBox x:Name="HeaderAutoSuggestBox"
+                            MinWidth="320"
+                            VerticalAlignment="Center"
+                            PlaceholderText="Search"
+                            QueryIcon="Find"
+                            QuerySubmitted="OnQuerySubmitted"
+                            TextChanged="OnTextChanged">
+                <AutoSuggestBox.KeyboardAccelerators>
+                    <KeyboardAccelerator Key="F"
+                                         Invoked="KeyboardAccelerator_Invoked"
+                                         Modifiers="Control" />
+                </AutoSuggestBox.KeyboardAccelerators>
+            </AutoSuggestBox>
+            <TitleBar.RightContent>
                 <Button x:Name="ThemeButton"
                         Height="32"
                         Margin="0,0,4,0"
@@ -42,7 +40,7 @@
                                                FontSize=16}"
                         Style="{ThemeResource SubtleButtonStyle}"
                         ToolTipService.ToolTip="Toggle Theme" />
-            </TitleBar.Footer>
+            </TitleBar.RightContent>
         </TitleBar>
         <NavigationView x:Name="NavView"
                         Grid.Row="1"