Issue backdrop#2128: [UX] Improve help text on "Update modules" page (b…

…ackdrop#1635)

core/modules/installer/installer.manager.inc

@@ -269,7 +269,8 @@ function installer_manager_update_form($form, $form_state = array(), $context) {
 
   if (!empty($projects['manual'])) {
     $prefix = '<h2>' . t('Manual updates required') . '</h2>';
-    $prefix .= '<p>' . t('Updates of Backdrop CMS core are not supported at this time.') . '</p>';
+    $prefix .= '<p>' . t('Updates of Backdrop CMS core using the web interface are not possible yet.') . '</p>';
+    $prefix .= '<p>' . t('You can update Backdrop CMS by replacing the old <code>/core</code> directory inside your docroot with the one included in the <a href="https://backdropcms.org/" title="Home page with download option">latest release</a>. For detailed instructions, see the <a href="https://backdropcms.org/upgrade" title="Handbook article">Upgrading Backdrop CMS</a> document online.') . '</p>';
     $form['manual_updates'] = array(
       '#type' => 'markup',
       '#markup' => theme('table', array('header' => $headers, 'rows' => $projects['manual'])),