update file list after closing Nextcloud Office document

[alexanderdd]

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Is your feature request related to a problem? Please describe.

1. open an office file in Nextcloud Office (Collabora) web interface
2. click export to pdf
3. close office file
4. why is my pdf not shown, I just exported it!
5. reload page
6. ahh, there is my pdf!

Describe the solution you'd like
pdf should be visible right after I close the office document, so: update file list after closing Nextcloud Office document

Maybe also a more general solution: immediately push file creation/deletion to all existing open browser tabs/windows (always, not only when closing an office file)