Trigger "menuToggle" event fix if menu is not ready at the time of clicking

If a user tabs or clicks to early on the mobile-menubutton before the menu finished loading,
the mobilemenu will still be displayed after it is loaded via ajax. In this case,
the trigger for the "menuToggle" event was missing.
Merge pull request #242 from mike-tuxedo/3.7-mobilemenu-showMenuAfterLoad-fix

Trigger "menuToggle" event fix if menu is not ready at the time of click...