Fix so plain text signature field uses monospace font (#1490435)

Aleksander Machniak

2015-06-17 3f4521bcf4b538b6ac54817cfad22b51e347546d

 program/lib/Roundcube/rcube_vcard.php

@@ -393,6 +393,10 @@
                    $this->raw[$tag][$index]['type'] = explode(',', ($typemap[$type_uc] ? $typemap[$type_uc] : $type));
                }
            }
            else {
                unset($this->raw[$tag]);
            }

            break;
        }
    }