Browser back button doesn't close preview

[gabrielmicko]

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Steps to reproduce

1. In files select a file image or pdf to preview.
2. It will show the file (pdf or image).
3. Click browser back button to close the file.

Expected behaviour

When I complete 3rd step it should navigate me back to the list of files.

Actual behaviour

Browser URL changes, but the user is stuck with the file open.

Server configuration

Operating system: Win / Chrome

Nextcloud version: (see Nextcloud admin page) Gabriel's cloud 20.0.14