Added some strings related to the update of the external packages timing

lang/en_utf8/scorm.php

@@ -29,8 +29,11 @@ $string['domxml'] = 'DOMXML external library';
 $string['element'] = 'Element';
 $string['entercourse'] = 'Enter course';
 $string['errorlogs'] = 'Errors log';
+$string['everyday']= 'Every day';
+$string['everytime']= 'Every time it\'s used';
 $string['exit'] = 'Exit from course';
 $string['expcoll'] = 'Expand/Collide';
+$string['external']= 'Update external packages timing';
 $string['failed'] = 'Failed';
 $string['firstaccess'] = 'First access';
 $string['firstattempt'] = 'First attempt';
@@ -84,6 +87,7 @@ $string['noscriptnoscorm'] = 'Your browser does not support javascript or it has
 $string['not_corr_type'] = 'Type mismatch for tag $a->tag';
 $string['notattempted'] = 'Not attempted';
 $string['objectives'] = 'Objectives';
+$string['onchanges']= 'Whenever it changes';
 $string['organization'] = 'Organization';
 $string['organizations'] = 'Organizations';
 $string['othertracks'] = 'Other Tracks';