NavigationView.ShoulderNavigationEnabled Property with value Always work as WhenSelectionFollowsFocus

[pavelshapovalov]

Describe the bug
When I set value Always in the NavigationView.ShoulderNavigationEnabled property, it still work as WhenSelectionFollowsFocus. This bug related with function NavigationView::BumperNavigation. Which have incorrect check in line:

|| !IsNavigationViewListSingleSelectionFollowsFocus()

Steps to reproduce the bug

1. Create navigation view with follow params:

    <NavigationView x:Name="testNavigation"
                    PaneDisplayMode="Top"
                    ShoulderNavigationEnabled="Always"></NavigationView>

2. Run application on xBox and trying to press gamepad bumpers buttons.

Expected behavior
Navigation work correct.

Version Info

Windows 10 version	Saw the problem?
Insider Build (xxxxx)
October 2018 Update (17763)	Yes
April 2018 Update (17134)
Fall Creators Update (16299)
Creators Update (15063)
Anniversary Update (14393)

Device form factor	Saw the problem?
Desktop
Mobile
Xbox	Yes
Surface Hub
IoT

[YuliKl]

Here's the documentation for ShoulderNavigationEnabled and SelectionFollowsFocus properties. The behavior described in this issue does not match the docs, so definitely sounds like a bug to me.

@pavelshapovalov - are you able to work around this issue by setting your app's SelectionFollowsFocus to Enabled? This behavior may be expected by Xbox users from their interactions with the Xbox homepage.

[pavelshapovalov]

@YuliKl Unfortunately not. Because I have toggle switch control into the navigation view, and SelectionFollowsFocus breaks the logic of the work. I will need to go through three tabs to enable or disable toggle in this case.
I've added other temporary work around. I added function like BumperNavigation which handle key up event for navigation view on page.