Merge pull request #1377 from mathjax/fix/mml-preload

Add missing preLoaded() call for input/mml when a11y is used.

Author: dpvc

components/mjs/a11y/util.js

@@ -9,5 +9,6 @@ Loader.preLoaded(
   'a11y/sre',
   'a11y/semantic-enrich',
   'a11y/speech',
-  'a11y/explorer'
+  'a11y/explorer',
+  'input/mml',
 );