Format money inputs in USD

[xmedr]

Overview

This formats the initial dollar amounts of pre-existing funding input fields to USD, with comma separators. This also applies the same formatting to those inputs as the user types.

Formatting while typing only applies when the amounts entered are numerical. And some extra validation was added now that those input fields allow for text instead of just numbers.

Closes #255

Demo

Testing Instructions

• Create/navigate to a project phase
  • Create funding streams if needed
• Confirm that pre-existing funding streams have their amounts already formatted to USD with comma separators
• Edit pre-existing and new funding streams, particularly their funds and actual costs
• Confirm that formatting does get applied while typing
• Update the fundings to ensure that new inputs are actually saved

[xmedr]

ah i was wondering why my extra options in toLocaleString weren't working before. it's because i was missing that "en-US" param at the very beginning that you mentioned. thanks for that!