[Issue #32] Update to use standard submitters

[figuerom16]

Issue: #32
Competing PRs: #33 #34
Difference from PRS: Correct issue early by setting "submit" event to elt.__fixi.evt and fx-trigger
Outcome: Native default behavior for form submissions (eg form button click includes name and value on send).

Native Form Submit Buttons https://developer.mozilla.org/en-US/docs/Glossary/Submit_button:

• <button> (its default type is "submit")
• <input type="submit">
• <input type="image">

Add CSS selectors for forms to pick submit event:

• If form button doesn't have type button and reset then it is a submit event. (Can't do type=submit since no attribute is often specified.)
• If form input has type submit or image then it is a submit event.

[NReib]

I applied this change lokally and it does not work for the reason I gave in Issue #32

Did you maybe also have an fx-action on the form during your tests or explicitly set fx-trigger to click on the button?

[figuerom16]

@NReib You're right it doesn't work without fx form attributes.
There isn't a good way for parent detection with CSS selectors from the element either.