[RCD] special-use

Hi all, im experimenting with the IMAP SPECIAL-USE setting. Works fine, except for one thing.

I think it’s a little weird that you can actually set and save a different special folder in preferences if that specific special folder is already set by IMAP SPECIAL-USE. Roundcube will detect a different special-use folder on the next login, and modify it back. This can create confusing preference-setting loops for the user, resulting in support request.

Wouldn’t it be possible to detect this before allowing the user to modify the special folder?

Cor