Quiz time period setting should use admin_setting_configduration

Go to Admin > Plugins > Activity modules > Quiz (> General settings if necessary.) Change all of the settings that now use the duration control Time limit - 7 minutes Submission grace period - 5 days Last submission grace period - 57 seconds Enforced delay between 1st and 2nd attempts - 37 minutes. Enforced delay between later attempts - 0 Auto-save delay - 3 seconds. Read the name and description of all those settings, to verify that the words make sense now that the setting type has been changed. Save changes, and verify that the values have been saved correctly. Add a new quiz to a course. For the settings that appear on the form, verify that the defaults you set are used. Start a quiz attempt, open developer tools console in your browser. Change an answer, and verify that the auto-save happens a few seconds after your answer was change.