Certainty quiz behaviours settings

This plugin simply adds a link to the settings page for the qbehaviour_certaintywithstudentfbdeferred plugin. This is needed because question behaviour plugins can not properly add settings page (see the related issue https://tracker.moodle.org/browse/MDL-68335).
Certainty quiz behaviours settings
This plugin simply adds a link to the settings page for the Degrees of Certainty with student feedback (deferred) plugin. This is needed because question behaviour plugins can not properly add settings page (see the related issue MDL-68335 ).