*
* Extra field can be used to add link to form, which allows
* to modify all fields supported by backend. This is the only field
*
* Extra field can be used to add link to form, which allows
* to modify all fields supported by backend. This is the only field
* sure that field data is sanitized and displayed correctly inside
* table cell. Use of html formating in other address book fields is
* not allowed. Backends that don't return 'extra' row in address book
* sure that field data is sanitized and displayed correctly inside
* table cell. Use of html formating in other address book fields is
* not allowed. Backends that don't return 'extra' row in address book