Default successHook on forms

[andjsch]

This PR moves the setTimeout() function into the successHook() method which allow for it to be overridden or skipped, depending on what you pass into the success_hook parameter of the partial.

If something is passed without a return statement, the setTimeout() will still be called, executing additional features before it. Passing something with a return statement, skips the setTimeout() completely.

Closes studio1902/statamic-peak#393

Changes proposed in this pull request:

• Moved the setTimeout() function into the successHook() method

[robdekort]

Nice. Also appreciate discussing this first. Awesome. Any chance you want to update the docs as well?

[robdekort]

Seems to work like a charm. Thank you!

[andjsch]

Happy to be able to contribute to your awesome work!

[andjsch]

Nice. Also appreciate discussing this first. Awesome. Any chance you want to update the docs as well?

Sure. I'll add it to my to-do for tomorrow!