Improve RTL support in HTML-CSS

Add CSS to prevent browser interference

unpacked/extensions/MathML/mml3.js

@@ -122,6 +122,9 @@ MathJax.Hub.Register.StartupHook("MathML Jax Ready",function () {
     MATHML.mml3XSLT = null;
   }
   
+  // Tweak CSS to avoid some browsers rearranging HTML output
+  MathJax.Ajax.Styles(".MathJax span { direction: ltr !important; display: inline-block !important;}");
+
   MathJax.Hub.Startup.signal.Post("MathML mml3.js Ready");
 });