Add bulk certification mode to certify widget
* shows slightly different info label * shows warning if one or more certificates cannot be certified * shows the primary user IDs and the fingerprints of the certificates * the primary user IDs of certificates that cannot be certified are disabled and cannot be checked; tool tip shows reason * the primary user ID of the chosen certification certificate is (temporarily) disabled and unchecked * hides the trust signature options
- GnuPG-bug-id: T6469