Public link password enforcement only for writeable links

[micbar]

Initial Checklist

• I understand this is a bug report and questions should be posted in the Community Discussions
• I searched issues and couldn’t find anything (or linked relevant results below)

Bug Description

If password enforcement is only set on Writeable public links, changing a link from "CanRead" to "CanWrite" fails.

Reproduction Steps

1. Set OC_SHARING_PUBLIC_SHARE_MUST_HAVE_PASSWORD=false
2. Set OC_SHARING_PUBLIC_WRITEABLE_SHARE_MUST_HAVE_PASSWORD=true
3. Create public link
4. Change link to "Can Write"

Expected Outcome

Password policy modal should pop up and a password can be generated/entered.

Actual Outcome

An error occurs because Web tries to change the link without using a password.

[micbar]

@JammingBen As we discussed.