Set some menuSettings to null so that the defaults work properly, but they still appear in the list so people know about them.

Author: dpvc

unpacked/MathJax.js

@@ -1889,15 +1889,15 @@ MathJax.Hub = {
       Shift: false,        //    require Shift?
       discoverable: false, //  make math menu discoverable on hover?
       zscale: "200%",      //  the scaling factor for MathZoom
-      renderer: "",        //  set when Jax are loaded
+      renderer: null,      //  set when Jax are loaded
       font: "Auto",        //  what font HTML-CSS should use
       context: "MathJax",  //  or "Browser" for pass-through to browser menu
-      locale: "en",        //  the language to use for messages
+      locale: null,        //  the language to use for messages
       mpContext: false,    //  true means pass menu events to MathPlayer in IE
       mpMouse: false,      //  true means pass mouse events to MathPlayer in IE
       texHints: true,      //  include class names for TeXAtom elements
-      FastPreview: true,   //  use PreviewHTML output as preview?
-      assistiveMML: true,  //  include hidden MathML for screen readers?
+      FastPreview: null,   //  use PreviewHTML output as preview?
+      assistiveMML: null,  //  include hidden MathML for screen readers?
       inTabOrder: true,    //  set to false if math elements should be included in the tabindex
       semantics: false     //  add semantics tag with original form in MathML output
     },

unpacked/config/default.js

@@ -242,15 +242,15 @@ MathJax.Hub.Config({
     Shift: false,        //    require Shift?
     discoverable: false, //  make math menu discoverable on hover?
     zscale: "200%",      //  the scaling factor for MathZoom
-    renderer: "",        //  set when Jax are loaded
+    renderer: null,      //  set when Jax are loaded
     font: "Auto",        //  what font HTML-CSS should use
     context: "MathJax",  //  or "Browser" for pass-through to browser menu
-    locale: "en",        //  the language to use for messages
+    locale: null,        //  the language to use for messages
     mpContext: false,    //  true means pass menu events to MathPlayer in IE
     mpMouse: false,      //  true means pass mouse events to MathPlayer in IE
     texHints: true,      //  include class names for TeXAtom elements
-    FastPreview: true,   //  use PreviewHTML output as preview?
-    assistiveMML: true,  //  include hidden MathML for screen readers?
+    FastPreview: null,   //  use PreviewHTML output as preview?
+    assistiveMML: null,  //  include hidden MathML for screen readers?
     inTabOrder: true,    //  set to true if math elements should be included in the tabindex
     semantics: false     //  add semantics tag with original form in MathML output
   },