Replace jQuery in "Before You Claim"

[mistergone]

This PR replaces jquery functions and methods with "vanilla" JavaScript so we no longer rely on jQuery in this app.

I attempted to replace jQuery without changing any lines of the existing code, but I did have to change the reference to a few event handlers just for ease. The existing functional tests are passing.

Additions

• Add dollar-sign.js which replaces relevant jQuery methods.

Changes

• Change a few event handlers to use Query.on()

How to test this PR

1. Check the functional tests in cypress
2. Visually check the app to make sure it matches the production apa

Checklist

• PR has an informative and human-readable title
• Changes are limited to a single goal (no scope creep)
• Code follows the standards laid out in the CFPB development guidelines
• Future todos are captured in comments and/or tickets
• Project documentation has been updated, potentially one or more of:

Front-end testing

This app should function exactly as it did before.

[anselmbradford]

Whoops, gave some suggestions and then realized I mis-read the jquery code for https://api.jquery.com/on/ and had the selector and data arguments swapped in my head. Deleted suggestions.