Ref #282 Added in the ability to create a dashboard notice to be sent out to the targets of an assessment when adding or editing an assignment.
$ENTRADA_USER->getID() returns a string, which was being identically compared to a sanitized int, which failed; the user was able to add themselves as a contact twice.
Refs #282: Minor unrelated bug fix to hide advanced options link when no students have submitted.
Merge branch 'develop' of https://github.com/EntradaProject/entrada-1x into feature-assignment-notices
Merge pull request #442 from EntradaProject/feature-assignment-notices

Notices for Assignment release feature branch merged.