Remove the submitbutton from the formhelper class and add event handlers instead

[escamoteur]

I'm not sure if it would be better not to generate the submit button out of the helper or if it would be better to let user wire their own button to a handler function inside the Helper because then you could define these buttons completely independent from the form but we could still provide standard builders that provide these buttons. following this I would also remove the submitButtonText from the Helper because this should be application specific.