3 cancel dialogs are displayed in application signed with expired certificate without manifest

Set security level to MEDIUM

Open this link

http://stt-13.ru.oracle.com/newroot/testsuites/180_user_ws/aluht/helloworld/signed_expired_nomf.html

an untrusted application w/o manifest warning will be shown

press 'Cancel'

a valid cert signed all-permission w/o manifest warning will be shown

press 'Cancel'

an unsigned application warning will be shown

press 'Cancel'

Application error will be shown

Expected:
- one 'cancel' should be enough
- no valid cert warning should be shown

This is not a regression, reproduced since at least 7u67 b01