Remove password checks for shared folders or make them optional

Remove password checks for shared folders or make them optional: Although I understand that usually it is a good idea to advocate for strong passwords, I am not so sure this makes sense in the specific use case of shared folders. One use case for such folders is to share files with a group of people like students, people on a conference etc., where the password is not strictly confidential anyway. It rather makes sure that the data cannot be collected by automated tools.