hide new folder button in choose type filepicker

[rummatee]

This pull requests aims to solve issue #14834
It hides the button to create a new folder in the filepicker if the type is choose.
I think that in this case it wouldn't make sense to create a new folder anyway.

Please review @MorrisJobke@jancborchardt @nextcloud/designers

[skjnldsv]

Hello @rummatee
Sorry, but this is a feature and should not be removed.
We need to fix the error instead.
See #13177 :)

[rummatee]

For the original pull request that introduced this feature, I had only the situation in mind where a file is moved. I also understand the original issue from @MariusBluem and @jancborchardt this way.
I didn't think about the fact, that the same filepicker dialog is also used for choosing a file (even though the name makes this pretty obvious 🙈 )
I think that in the case of choosing a file, it doesn't make sense to create a new folder (at least as long as it isn't possible to move a file there, too) and this pull request only removes the button in this case.
Leaving this button outside of the files app would require an alternative way to check if a name for the new folder is valid.

[skjnldsv]

@rummatee my apologise, I thought someone else created the original pull request.
We're in beta2, so I think you're right, we should get this in!! 🚀

Sorry for the misunderstanding! I should have read better ! 🙇‍♀️