Add events for callbacks at certain events

[gingerchew]

Recently needed to add a success callback for a form to change a different elements text other than the submit button.

window.addEventListener('WHC|formID::Success', () => labelElement.textContent = 'text label');

Some possible places for callbacks to fit in

• Success verifying
• Failure verifying
• Progress
• Start

This also gives the opportunity to get rid of the debug functionality that exists internally, since it serves little purpose anymore