Revert to using "Reference" for title

pd/nw/dialog_search.html

@@ -56,8 +56,8 @@ var toc = [
     },
     {
         id: "doc/5.reference",
-        title: "Internal Objects",
-        description: "Purr Data's built-in classes"
+        title: "Reference",
+        description: "help patches for all built-in object classes"
     },
 /*
     {