Roundcube Webmail with calendar (caldav & kolab)

Roundcube Webmail should be available also for Windows Servers.
Important is also, that the plugin calendar with caldav and kolab support is automaticly included inside the plugin-directory.

Roundcube is a nice working, fast and clean looking webmail client. Horde is not a webmail-system clients want to see.

This is a request that should be integrated into plesk for windows as soon as possible.