Always on top: window context menu to always on top (#45773)

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fix/what does it change/how was it tested (even manually, if necessary)?
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## Summary of the Pull Request

Add an option to enable inject a window context menu to always on top
this window.

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## PR Checklist

- [ ] Closes: #45638 #15387
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issues) -->
- [ ] **Communication:** I've discussed this with core contributors
already. If the work hasn't been agreed, this work might be rejected
- [ ] **Tests:** Added/updated and all pass
- [ ] **Localization:** All end-user-facing strings can be localized
- [ ] **Dev docs:** Added/updated
- [ ] **New binaries:** Added on the required places
- [ ] [JSON for
signing](https://github.com/microsoft/PowerToys/blob/main/.pipelines/ESRPSigning_core.json)
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- [ ] [WXS for
installer](https://github.com/microsoft/PowerToys/blob/main/installer/PowerToysSetup/Product.wxs)
for new binaries and localization folder
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and link it here: #xxx

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## Detailed Description of the Pull Request / Additional comments

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## Validation Steps Performed

https://github.com/user-attachments/assets/37eb3f74-1ccc-42f2-83c3-1100f55765ee

---------

Co-authored-by: Niels Laute <niels.laute@live.nl>

src/settings-ui/Settings.UI/SettingsXAML/Views/AlwaysOnTopPage.xaml

@@ -34,9 +34,20 @@
                         IsExpanded="True">
                         <controls:ShortcutControl MinWidth="{StaticResource SettingActionControlMinWidth}" HotkeySettings="{x:Bind Path=ViewModel.Hotkey, Mode=TwoWay}" />
                         <tkcontrols:SettingsExpander.Items>
+                            <tkcontrols:SettingsCard>
+                                <tkcontrols:SettingsCard.Description>
+                                    <StackPanel Orientation="Vertical">
+                                        <tkcontrols:MarkdownTextBlock Config="{StaticResource DescriptionTextMarkdownConfig}" Text="{x:Bind ViewModel.IncreaseOpacityShortcut, Mode=OneWay}" />
+                                        <tkcontrols:MarkdownTextBlock Config="{StaticResource DescriptionTextMarkdownConfig}" Text="{x:Bind ViewModel.DecreaseOpacityShortcut, Mode=OneWay}" />
+                                    </StackPanel>
+                                </tkcontrols:SettingsCard.Description>
+                            </tkcontrols:SettingsCard>
                             <tkcontrols:SettingsCard ContentAlignment="Left">
                                 <CheckBox x:Uid="AlwaysOnTop_GameMode" IsChecked="{x:Bind ViewModel.DoNotActivateOnGameMode, Mode=TwoWay}" />
                             </tkcontrols:SettingsCard>
+                            <tkcontrols:SettingsCard ContentAlignment="Left">
+                                <ptcontrols:CheckBoxWithDescriptionControl x:Uid="AlwaysOnTop_ContextMenuEnabled" IsChecked="{x:Bind ViewModel.ShowInSystemMenu, Mode=TwoWay}" />
+                            </tkcontrols:SettingsCard>
                         </tkcontrols:SettingsExpander.Items>
                     </tkcontrols:SettingsExpander>
 
@@ -97,22 +108,6 @@
                     <tkcontrols:SettingsCard x:Uid="AlwaysOnTop_Sound" HeaderIcon="{ui:FontIcon Glyph=&#xE7F3;}">
                         <ToggleSwitch IsOn="{x:Bind ViewModel.SoundEnabled, Mode=TwoWay}" />
                     </tkcontrols:SettingsCard>
-
-                    <tkcontrols:SettingsExpander
-                        x:Uid="AlwaysOnTop_TransparencyInfo"
-                        HeaderIcon="{ui:FontIcon Glyph=&#xE790;}"
-                        IsExpanded="True">
-                        <tkcontrols:SettingsExpander.Items>
-                            <tkcontrols:SettingsCard>
-                                <tkcontrols:SettingsCard.Description>
-                                    <StackPanel Orientation="Vertical">
-                                        <tkcontrols:MarkdownTextBlock Config="{StaticResource DescriptionTextMarkdownConfig}" Text="{x:Bind ViewModel.IncreaseOpacityShortcut, Mode=OneWay}" />
-                                        <tkcontrols:MarkdownTextBlock Config="{StaticResource DescriptionTextMarkdownConfig}" Text="{x:Bind ViewModel.DecreaseOpacityShortcut, Mode=OneWay}" />
-                                    </StackPanel>
-                                </tkcontrols:SettingsCard.Description>
-                            </tkcontrols:SettingsCard>
-                        </tkcontrols:SettingsExpander.Items>
-                    </tkcontrols:SettingsExpander>
                 </controls:SettingsGroup>
 
                 <controls:SettingsGroup x:Uid="ExcludedApps" IsEnabled="{x:Bind ViewModel.IsEnabled, Mode=OneWay}">