Javascript overhaul: case_contact.js

[FireLemons]

What changed, and why?

• Removed unreachable input checks because the javascript tries to run after the page refreshes(to be added back in later)
• Fixed miles driven warning for non physical means of contact
• Moved all native js to jQuery so it doesn't throw errors if the elements don't exist
• removed a test for a feature that will be refactored

How is this tested? (please write tests!) 💖💪

System tests in CI hopefully

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