(Popup) Enable Popup v2 Inside Custom NavigationPage

[pictos]

Description of Change

Removed the NavigationBar and make sure the Close will work. When you open a Popup inside a ModalPage the Popup will not show on ModalStack, what shows up is a NavigationPage and the PopupPage will be its Content.

Linked Issues

• Fixes [BUG] Popup V2 within NavigationPage #2839

PR Checklist

• Has a linked Issue, and the Issue has been approved(bug) or Championed (feature/proposal)
• Has tests (if omitted, state reason in description)
• Has samples (if omitted, state reason in description)
• Rebased on top of main at time of PR
• Changes adhere to coding standard
• Documentation created or updated: https://github.com/MicrosoftDocs/CommunityToolkit/pulls

Additional information

[Copilot]

Pull Request Overview

This PR addresses an issue where popups opened inside modal pages fail to display correctly due to navigation bar interference. The fix removes the navigation bar from popup pages and implements proper modal stack traversal to locate and close popups that are wrapped in navigation containers.

Key Changes:

• Explicitly disables the navigation bar for popup pages to prevent UI conflicts
• Adds a FindPopupPage() method to handle closing popups that are nested within page containers (e.g., NavigationPage)
• Removes unused imports to clean up the code

[TheCodeTraveler]

Thanks Pedro! Could you add some UnitTests before we merge this?

[nikamvd]

@pictos Is there any way to apply this fix while using the current CommunityToolkit.Maui version 12.3.0 until this fix gets released in a newer version? My project heavily relies on showing modal pages wrapped inside navigation pages, which I can't change at this moment due to the amount of refactoring that will be needed.

[TheCodeTraveler]

Thanks Pedro!

I added a reproduction to the Sample app along with some Unit Tests 🙌