Captured transactions need to be looked up based on pspreference

The notification that's present in the capture message is the wrong
notification - it's the one that contains the capture, not the
authorization. And we only explicitly keep track of the one that
keeps the authorization in the database, so we need to go back to
matching on pspreference.
Oops, need to look at the *original* pspReference, not the notification one
Store payment method and merchant reference in transaction status as well
Show link instead of dropdown for notification in transactionstatus as well