MDL-79048 course: Add editing versions of course view page titles

* Create 'editing' versions of the coursetitle and coursesectiontitle
lang strings used for the page title of the course homepage and use
these when editing mode is turned on to provide immediate information
to users, especially screen reader users, the current state of the
course homepage.

course/view.php

@@ -259,19 +259,25 @@ if ($PAGE->user_allowed_editing()) {
     $PAGE->set_button($buttons);
 }
 
+$editingtitle = '';
+if ($PAGE->user_is_editing()) {
+    // Append this to the page title's lang string to get its equivalent when editing mode is turned on.
+    $editingtitle = 'editing';
+}
+
 // If viewing a section, make the title more specific.
 if ($section && $section > 0 && course_format_uses_sections($course->format)) {
     $sectionname = get_string('sectionname', "format_$course->format");
     $sectiontitle = get_section_name($course, $section);
     $PAGE->set_title(
         get_string(
-            'coursesectiontitle',
+            'coursesectiontitle' . $editingtitle,
             'moodle',
             ['course' => $course->fullname, 'sectiontitle' => $sectiontitle, 'sectionname' => $sectionname]
         )
     );
 } else {
-    $PAGE->set_title(get_string('coursetitle', 'moodle', ['course' => $course->fullname]));
+    $PAGE->set_title(get_string('coursetitle' . $editingtitle, 'moodle', ['course' => $course->fullname]));
 }
 
 // Add bulk editing control.

lang/en/moodle.php

@@ -418,7 +418,8 @@ $string['courserestore'] = 'Course restore';
 $string['coursereuse'] = 'Course reuse';
 $string['courses'] = 'Courses';
 $string['coursesectionsummaries'] = 'Course section summaries';
-$string['coursesectiontitle'] = 'Course: {$a->course}, {$a->sectionname}: {$a->sectiontitle}';
+$string['coursesectiontitle'] = '{$a->sectionname}: {$a->sectiontitle} | {$a->course}';
+$string['coursesectiontitleediting'] = 'Edit {$a->sectionname}: {$a->sectiontitle} | {$a->course}';
 $string['coursesettings'] = 'Course default settings';
 $string['coursesmovedout'] = 'Courses moved out from {$a}';
 $string['coursespending'] = 'Courses pending approval';
@@ -432,6 +433,7 @@ $string['coursestart'] = 'Course start';
 $string['coursesummary'] = 'Course summary';
 $string['coursesummary_help'] = 'A short description of your course. The content you add here is searchable.';
 $string['coursetitle'] = 'Course: {$a->course}';
+$string['coursetitleediting'] = 'Edit course: {$a->course}';
 $string['courseupdates'] = 'Course updates';
 $string['coursevisibility'] = 'Course visibility';
 $string['coursevisibility_help'] = '* Show: The course appears in the list of courses and students can access it.