fix: make notifyicon contextmenu display

[IOL0ol1]

Pull request type

Please check the type of change your PR introduces:

• Update
• Bugfix
• Feature
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no api changes)
• Build related changes
• Documentation content changes

What is the current behavior?

Issue Number: N/A

NotifyIcon's ContextMenu not display

What is the new behavior?

• now we can see the NotifyIcon's ContextMenu

Other information

The context menu isn't part of the same visual tree and therefore doesn't have the same DataContext.
I have provided a tip here to solve this problem.

[IOL0ol1]

use x:Name=MainWindow is better, but i want less code.

[chucker]

I think x:Reference is discouraged, but I'm only not sure after reading https://learn.microsoft.com/en-us/dotnet/desktop/xaml-services/xreference-markup-extension#xreference-and-wpf.

[IOL0ol1]

   <tray:NotifyIcon
       FocusOnLeftClick="True"
       MenuOnRightClick="True">
       <tray:NotifyIcon.Resources>
           <DiscreteObjectKeyFrame x:Key="proxy" Value="{Binding}"/>
       </tray:NotifyIcon.Resources>
       <tray:NotifyIcon.Menu>
           <ContextMenu  DataContext="{Binding Source={StaticResource proxy},Path=Value}">
               <ui:MenuItem
                   Name="OpenSettings"
                   Command="{Binding OpenSettingsCommand}"
                   CommandParameter="123"
                   Header="{x:Static str:Resources.AppSetting}" />
               <ui:MenuItem
                   Name="Exit"
                   Command="{Binding ExitAppCommand}"
                   Header="{x:Static str:Resources.AppExit}" />
           </ContextMenu>
       </tray:NotifyIcon.Menu>
   </tray:NotifyIcon>

ok,i have plan b