Fixes theme helper to have config array always available

app/helpers/theme.php

@@ -193,14 +193,19 @@ class Theme
      */
     public static function include($template)
     {
-        $themeName = self::getCurrentThemeName();
-        $config = self::getConfig();
+        global $config;
+        $config = $config ?? [];
+
+        $themeConfig = self::getConfig();
+        $themeName = self::getCurrentThemeName();
 
-        // Import all global variables into local scope
         // We need this here, otherwise because this helper
         // between index and the views breaks the session vars
         extract($GLOBALS, EXTR_SKIP | EXTR_REFS);
 
+        // Ensure config is always available in templates
+        $config = array_merge($config, $themeConfig);
+
         // For non-default themes, look in the theme directory first
         if ($themeName !== 'default') {
             $themePath = $config['paths']['themes'] . '/' . $themeName . '/views/' . $template . '.php';