Add language strings

lang/en/local_hshexport.php

@@ -27,3 +27,7 @@ defined('MOODLE_INTERNAL') || die();
 
 $string['hshexport:canexport'] = 'Can export user csv for  evasys';
 $string['pluginname'] = 'HSH User export';
+$string['nav_course'] = 'Navigation node in course navigation';
+$string['nav_participants'] = 'Navigation node in participants page jump menu';
+$string['navigation'] = 'Navigation node placement';
+$string['navigation_desc'] = 'The location where the navigation node for user bulk enrolment will be added within a course.';