Forced $CFG config checkbox, select, textarea are not disabled in gui

Prerequisite A site with multiple course categories. Textareas Visit 'Site administration' > 'Appearance' > 'Additional HTML' Confirm the 'additionalhtmlfooter' text box is empty and editable Enter something and save it, confirm it works and it appears in the foot of the page In config.php set: $CFG->additionalhtmlfooter = "second test"; Confirm it is overridden and disabled Checkboxes Visit 'Site administration' > 'Courses' > 'Course request' Uncheck 'enablecourserequests' and click 'Save changes' Confirm that it was saved successfully. In config.php set: $CFG->enablecourserequests = 1; Refresh the page Confirm it is now checked and disabled Single select Visit 'Site administration' > 'Courses' > 'Course request' Confirm 'defaultrequestcategory' is set to the default and can be changed. In config.php set $CFG->defaultrequestcategory = 2; Refresh the page Confirm it is visibly locked and disabled Multiple select Visit 'Site administration' > 'Courses' > 'Course request' Confirm 'courserequestnotify' is editable In config.php set $CFG->courserequestnotify = '$@NONE@$,$@ALL@$'; Refresh the page and confirm it is locked and disabled