[horde] PHP 7 Imap

[Twilek]

I have tried to switch to PHP 7. It almost worked. I got problems with  
IMAP (the PHP7 Module is installed and working). When opening IMP I  
only saw the inbox and the messages inside. Authentication against  
IMAP worked as well, at least for an administrator. Are there any  
known problems with the IMAP module and horde? I am using Debian  
testing with dovecot as the imap server on the same host.

Regards

Henning