Add option to disable page zooming in mobile browsers

[the-dipsy]

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Is your feature request related to a problem? Please describe.
When using the web version of Nextcloud on a mobile browser (tested on iOS 17.2.1), the ability to zoom in and the browsers automatic zooming when using input elements makes the operation of the page pretty cumbersome, especially when zooming out to far leads to page reloading. Without zooming the page would mostly behave like a native app.

Describe the solution you'd like
Add an option to disable page zooming on mobile devices for the entire instance and for individual users.

Describe alternatives you've considered
As a workaround the outdated but still functional jsloader app can be used to fix this problem with the Javascript code document.head.querySelector("meta[name=viewport]").content += ", user-scalable=no".

[juliusknorr]

Fixed by #47371

[the-dipsy]

I haven't tried it but the pull request reads like manual zooming is still possible on iOS, right?

[juliusknorr]

Yes.