Support multi-lang in user profile fields.

export.php

@@ -105,7 +105,7 @@ if ($formdata = $mform->get_data()) {
                 } else if (in_array($opt, array_column($customfields, 'shortname'))) {
                     foreach ($customfields as $customfield) {
                         if ($opt == $customfield->shortname) {
-                            $data->tabhead[] = $customfield->name;
+                            $data->tabhead[] = format_string($customfield->name, true, array('context' => $context));
                         }
                     }
                 } else {
@@ -169,7 +169,7 @@ if ($formdata = $mform->get_data()) {
                 foreach (array_keys($formdata->ident) as $opt) {
                     if (in_array($opt, array_column($customfields, 'shortname'))) {
                         if (isset($user->profile[$opt])) {
-                            $data->table[$i][] = $user->profile[$opt];
+                            $data->table[$i][] = format_string($user->profile[$opt], true, array('context' => $context));
                         } else {
                             $data->table[$i][] = '';
                         }

settings.php

@@ -109,7 +109,7 @@ if ($ADMIN->fulltree) {
     $fields = array('id' => get_string('studentid', 'attendance'));
     $customfields = profile_get_custom_fields();
     foreach ($customfields as $field) {
-        $fields[$field->shortname] = $field->name;
+        $fields[$field->shortname] = format_string($field->name);
     }
 
     $settings->add(new admin_setting_configmultiselect('attendance/customexportfields',