added description to admin settings page

lang/en/enrol_apply.php

@@ -12,6 +12,7 @@
 // The name of your plugin. Displayed on admin menus.
 $string['enrolname'] = 'Course enrol confirmation';
 $string['pluginname'] = 'Course enrol confirmation';
+$string['pluginname_desc'] = 'With this plugin users can apply to a course and a teacher have to comfirm before the user gets enroled.';
 
 $string['confirmmailsubject'] = 'Confirm mail subject';
 $string['confirmmailcontent'] = 'Confirm mail content';

settings.php

@@ -14,7 +14,7 @@ defined('MOODLE_INTERNAL') || die();
 if ($ADMIN->fulltree) {
 
     //--- general settings -----------------------------------------------------------------------------------
-    $settings->add(new admin_setting_heading('enrol_apply_enrolname','',''));
+    $settings->add(new admin_setting_heading('enrol_apply_enrolname','',get_string('pluginname_desc', 'enrol_apply')));
     
     $settings->add(new admin_setting_configtext('enrol_apply/confirmmailsubject','',get_string('confirmmailsubject', 'enrol_apply'),null,PARAM_TEXT,60));