MDL-68167 user: Fix a hardcoded string to be read from lang pack

lang/en/user.php

@@ -33,6 +33,7 @@ $string['clearfilterselection'] = 'Remove "{$a}" from filter';
 $string['countparticipantsfound'] = '{$a} participants found';
 $string['filterrowlegend'] = 'Filter {$a}';
 $string['filtersetmatchdescription'] = 'How multiple filters should be combined';
+$string['filtertype'] = 'Filter type';
 $string['match'] = 'Match';
 $string['matchofthefollowing'] = 'of the following:';
 $string['moodlenetprofile'] = 'MoodleNet profile';

user/templates/local/participantsfilter/filterrow.mustache

@@ -46,7 +46,7 @@
                 </select>
             </div>
 
-            <label class="sr-only pt-2" for="core_user-local-participantsfilter-filterrow-filtertype-{{uniqid}}">filtertype</label>
+            <label class="sr-only pt-2" for="core_user-local-participantsfilter-filterrow-filtertype-{{uniqid}}">{{#str}}filtertype, core_user{{/str}}</label>
             <select class="custom-select mb-1 mb-md-0 mr-md-2" data-filterfield="type" id="core_user-local-participantsfilter-filterrow-filtertype-{{uniqid}}">
                 <option value="">{{#str}}selectfiltertype, core_user{{/str}}</option>
                 {{#filtertypes}}