Add public_html directory to be used as document root or alias directory for Roundcube installations. This will only expose the required resources to public access
Allow plugins to override message compose mode
Make require_plugin() force loading of the required plugin
Clean HTML message body from URL parameters after enabling HTML mode in commit e957bfec
Reset $part_orig_mimetype variable in for-loop. This avoids attachments along with message/rfc822 parts being listed twice