Fix pre-authenticated buttons in Safari (iOS)

[LukasKalbertodt]

The buttons for Studio and editor don't work if pre-authentication is enabled. In that case, it's actually a <form> with some hidden inputs. And the button is supposed to submit that form. That doesn't happen on Safari though (at least on iOS). Maybe because we have a custom click handler attached to the button, the default "submit" behavior isn't triggered anymore?

[owi92]

The "submit" behaviour appears to be triggered, but I think the issue might be caused by the built-in popup blocker in safari. I cannot say for sure as browserstack unfortunately doesn't allow turning that off in our price tier..... @LukasKalbertodt, if you haven't done this yet, can you test turning it off on your iphone?

[LukasKalbertodt]

I did turn off "Content blockers" and my "AdGuard" extension, but still: doesn't work.

[owi92]

Yeah I was afraid that it wouldn't help either. This is a pain to debug.