MDL-30911: mod_lesson: fix sub-heading level to be lower than lesson …

…title. This issue is an improvement of accessibility compliance

mod/lesson/pagetypes/branchtable.php

@@ -110,7 +110,8 @@ public function display($renderer, $attempt) {
         if ($this->lesson->slideshow) {
             $output .= $renderer->slideshow_start($this->lesson);
         }
-        $output .= $renderer->heading(format_string($this->properties->title));
+        // We are using level 3 header because the page title is a sub-heading of lesson title (MDL-30911).
+        $output .= $renderer->heading(format_string($this->properties->title), 3);
         $output .= $renderer->box($this->get_contents(), 'contents');
 
         $buttons = array();

mod/lesson/view.php

@@ -391,7 +391,8 @@
     lesson_add_fake_blocks($PAGE, $cm, $lesson, $timer);
     echo $lessonoutput->header($lesson, $cm, $currenttab, $extraeditbuttons, $lessonpageid);
     if ($attemptflag) {
-        echo $OUTPUT->heading(get_string('attempt', 'lesson', $retries));
+        // We are using level 3 header because attempt heading is a sub-heading of lesson title (MDL-30911).
+        echo $OUTPUT->heading(get_string('attempt', 'lesson', $retries), 3);
     }
     /// This calculates and prints the ongoing score
     if ($lesson->ongoing && !empty($pageid) && !$reviewmode) {
@@ -415,7 +416,8 @@
     // Update the clock / get time information for this user
     add_to_log($course->id, "lesson", "end", "view.php?id=".$PAGE->cm->id, "$lesson->id", $PAGE->cm->id);
 
-    $lessoncontent .= $OUTPUT->heading(get_string("congratulations", "lesson"));
+    // We are using level 3 header because the page title is a sub-heading of lesson title (MDL-30911).
+    $lessoncontent .= $OUTPUT->heading(get_string("congratulations", "lesson"), 3);
     $lessoncontent .= $OUTPUT->box_start('generalbox boxaligncenter');
     $ntries = $DB->count_records("lesson_grades", array("lessonid"=>$lesson->id, "userid"=>$USER->id));
     if (isset($USER->modattempts[$lesson->id])) {