Back link to close the immersive page is not preserved when opening the 'Next folder' link in the resource sidebar

[radinamatic]

Observed behavior

While testing the #11426 I noticed that if I use the sidebar to navigate to resources in the next folder, it's like those folders are being opened in separate immersive pages one on top of the other that afterwards need to be closed separately:

not-closing-channel.mp4

Opening the resource directly form the main panel does not produce the same issue.
@rtibbles suggests that he link generation option for preserving the back link might be set wrong.

Errors and logs

Nothing visible in the console

Expected behavior

Close (✖️) button should close the immersive page and return the user to the Library page.

User-facing consequences

Confusing navigation and inability to return to the Library page if they have been using the 'Next folder' link to navigate.

Steps to reproduce

1. Open a resource sidebar
2. Click the 'Next folder' link
3. Repeat 1 and 2 several times
4. Try closing the immersive page

Context

• Kolibri version: DEB asset from Update MissingResourceAlert to report sync status #11426 installed on
• Operating system: Ubuntu 20.04
• Browser: Firefox and Chrome