MDL-87415 profile: set page title when accessed as guest user.

public/lang/en/moodle.php

@@ -1256,6 +1256,7 @@ $string['loginstepsnone'] = '<p>Hi!</p>
 <p>If someone else has already chosen your username then you\'ll have to try again using a different username.</p>';
 $string['loginto'] = 'Log in to {$a}';
 $string['loginagain'] = 'Log in again';
+$string['loginrequired'] = 'Login required';
 $string['logoof'] = 'Logo of {$a}';
 $string['logout'] = 'Log out';
 $string['logoutconfirm'] = 'Do you really want to log out?';

public/user/view.php

@@ -66,6 +66,7 @@ if (!empty($CFG->forceloginforprofiles)) {
     // Guests do not have permissions to view anyone's profile if forceloginforprofiles is set.
     if (isguestuser()) {
         $PAGE->set_secondary_navigation(false);
+        $PAGE->set_title(get_string('loginrequired'));
         echo $OUTPUT->header();
         echo $OUTPUT->confirm(get_string('guestcantaccessprofiles', 'error'),
                               get_login_url(),