fix generation of theme unique value

refresh session cache for config after save

libraries/Config.class.php

@@ -458,6 +458,7 @@ class PMA_Config
         $config_data = $_SESSION['cache'][$cache_key]['userprefs'];
         // type is 'db' or 'session'
         $this->set('user_preferences', $_SESSION['cache'][$cache_key]['userprefs_type']);
+        $this->set('user_preferences_mtime', $_SESSION['cache'][$cache_key]['userprefs_mtime']);
 
         // backup some settings
         $org_fontsize = $this->settings['fontsize'];
@@ -712,7 +713,7 @@ class PMA_Config
             $fontsize +
             $this->source_mtime +
             $this->default_source_mtime +
-            (isset($_SESSION['cache']['userprefs_mtime']) ? $_SESSION['cache']['userprefs_mtime'] : 0) +
+            $this->get('user_preferences_mtime') +
             $_SESSION['PMA_Theme']->mtime_info +
             $_SESSION['PMA_Theme']->filesize_info)
             . (isset($_SESSION['tmp_user_values']['custom_color']) ? substr($_SESSION['tmp_user_values']['custom_color'],1,6) : '');

prefs_forms.php

@@ -52,6 +52,8 @@ if ($form_display->process(false) && !$form_display->hasErrors()) {
     $old_settings = PMA_load_userprefs();
     $result = PMA_save_userprefs(ConfigFile::getInstance()->getConfigArray());
     if ($result === true) {
+        // reload config
+        $GLOBALS['PMA_Config']->loadUserPreferences();
         $hash = ltrim(filter_input(INPUT_POST, 'tab_hash'), '#');
         PMA_userprefs_redirect($forms, $old_settings, 'prefs_forms.php', array(
             'form' => $form_param), $hash);

prefs_manage.php

@@ -175,6 +175,8 @@ if (isset($_POST['submit_export']) && filter_input(INPUT_POST, 'export_type') ==
             } else {
                 $return_url = 'prefs_manage.php';
             }
+            // reload config
+            $GLOBALS['PMA_Config']->loadUserPreferences();
             PMA_userprefs_redirect($forms, $old_settings, $return_url, $params);
             exit;
         } else {