Merge pull request #1336 from mathjax/fix/help-option

Add missing 'help' menu option

Author: dpvc

ts/ui/menu/Menu.ts

@@ -158,6 +158,7 @@ export class Menu {
       speechRules: 'clearspeak-default',
       roleDescription: 'math',
       tabSelects: 'all',
+      help: true,
     },
     jax: {
       CHTML: null,