Prevent enforced password removal when creating or editing a share

[xavi-b]

Steps to reproduce

1. Setup your server to enforce password protection on shares
2. Create or edit a share

Expected behaviour

Based on the capabilities (I guess ?) from the server, we should not be able to remove password protect in this view :

Actual behaviour

Instead we can change it but then when sharing we get the expected following error :

Reasoning or why should it be changed/implemented?

Because as users we can lose all other changes we made to the share since the creation/editing of the share fails.

Environment data

Nextcloud iOS app version: 5.3.2

[marinofaggiana]

@mpivchev