MDL-86512 mod_assign: Make the select column header name more accessible

mod/assign/gradingtable.php

@@ -383,9 +383,24 @@ class assign_grading_table extends table_sql implements renderable {
         // Select.
         if (!$this->is_downloading() && $this->hasgrade) {
             $columns[] = 'select';
-            $headers[] = get_string('select') .
-                    '<div class="selectall"><label class="accesshide" for="selectall">' . get_string('selectall') . '</label>
-                    <input type="checkbox" id="selectall" name="selectall" title="' . get_string('selectall') . '"/></div>';
+            // The displayed text for the column header. Hidden to assistive technologies.
+            $visibleheader = html_writer::span(get_string('select'), '', ['aria-hidden' => 'true']);
+            // The actual accessible name for the column header which provides more context about the column's purpose to
+            // screen reader users.
+            $bulkactionsselection = html_writer::span(get_string('bulkactionsselection', 'assign'), 'visually-hidden');
+
+            // The select all checkbox.
+            $selectalllabel = html_writer::label(get_string('selectall'), 'selectall', false, ['class' => 'visually-hidden']);
+            $selectallcheckbox = html_writer::empty_tag(
+                'input',
+                [
+                    'type' => 'checkbox',
+                    'id' => 'selectall',
+                    'name' => 'selectall',
+                ],
+            );
+            $headers[] = $visibleheader . $bulkactionsselection .
+                html_writer::div($selectalllabel . $selectallcheckbox, 'selectall');
         }
 
         if ($this->hasviewblind || !$this->assignment->is_blind_marking()) {

mod/assign/lang/en/assign.php

@@ -150,6 +150,7 @@ $string['blindmarking'] = 'Anonymous submissions';
 $string['blindmarkingenabledwarning'] = 'Anonymous submissions are enabled for this activity.';
 $string['blindmarkingnogradewarning'] = 'Anonymous submissions are enabled for this activity. Grades will not be added to the gradebook until student identities are revealed via the "Actions" menu.';
 $string['blindmarking_help'] = 'Anonymous submissions hide the identity of students from markers. Anonymous submission settings will be locked once a submission or grade has been made in relation to this assignment.';
+$string['bulkactionsselection'] = 'Bulk actions selection';
 $string['cachedef_overrides'] = 'User and group override information';
 $string['calendardue'] = '{$a} is due';
 $string['calendarextension'] = '{$a} is due (extension)';