[.Net10][Proposal][Shell] Shell.PopToRootOnTabReselect property

[kubaflo]

Description of Change

This PR introduces a new BindableProperty called PopToRootOnTabReselectProperty in .NET MAUI Shell. This property allows developers to control whether reselecting the currently active tab should automatically pop its navigation stack to the root page.

On iOS, this behavior is already the default, but on Android, tabs retain their navigation stack when reselected. This property provides a way to align Android’s behavior with iOS, ensuring a consistent user experience across platforms.

Motivation

In many tab-based applications, users expect that tapping an already selected tab should reset its navigation stack, bringing them back to the root of that section. Currently, this behavior must be manually implemented with lots of additional workarounds. This property provides a built-in way to achieve this functionality, improving developer experience and reducing boilerplate code.

Demo

Android	iOS
Screen.Recording.2025-03-22.at.16.09.44.mov	Screen.Recording.2025-03-22.at.16.14.54.mov

Usage

<Shell
    xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
    xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
    x:Class="Maui.Controls.Sample.SandboxShell"
    Shell.PopToRootOnTabReselect = "True">

Issues Fixed

Fixes #27401
Fixes #15301

[dotnet-policy-service]

Hey there @kubaflo! Thank you so much for your PR! Someone from the team will get assigned to your PR shortly and we'll get it reviewed.

[jsuarezruiz]

/azp run

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[jsuarezruiz]

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