Change JavaScript form `submit()` calls to `requestSubmit()`

[ssddanbrown]

As described here: https://developer.mozilla.org/en-US/docs/Web/API/HTMLFormElement/requestSubmit

This would play nicer with normal event handling.
Thought about while helping build a JS hack, where existing submit event was difficult to override since it ignores the event system.

[shresthkapoor7]

Hey Dan, I’d like to work on this. I’ll audit the .submit() usage across the frontend and swap them with requestSubmit() where safe. Let me know if there are any edge cases I should watch for.

[ssddanbrown]

@shresthkapoor7 Sure, go ahead, thanks!
I'm not sure of any specific edge-cases, I just ask that you manually test each related submit which is changed.