Follow up from T326619#9177744

WHEN an organizer does not have an email address confirmed
AND attempts to send a message to participants
AND a warning is shown To message participants, you'll need an email address on your account. Add email.
THEN this message should display above the Recipients / Add recipients button, as it is a central warning for the whole page.

comp	build

Acceptance criteria:

The To message participants, you'll need an email address on your account. Add email. warning displays above the Recipients / Add recipients button