Feature/phase and funding form

[xmedr]

Overview

This allows for the manipulation of multiple funding streams from a phase edit page. Features include:

• adding multiple new fundings at once
• editing multiple existing fundings at once
• warning the user if new fundings have not been saved when navigating away
• front and back end validation of values

Closes #156

Demo

Notes

The funding table scrolls horizontally on small screen sizes. This is the best display I could come up with, but if there is a more appealing way of fitting the table please lmk!

Testing Instructions

• Create a project and add a phase
  • Confirm that the Update Funding and Add a Source buttons don't render yet while on the creation page
• After creating a phase, use the Add a source button to add a few rows
• Use the Remove button to get rid of some of the rows
• Test the forms with valid and invalid inputs and hit the Update button
  • Confirm that error messages show appropriately for invalid inputs
  • Confirm that error messages disappear once fixed
• The page should reload after hitting update, when all inputs are valid
  • Confirm that your inputs are saved (indicated by a Delete button next to the fundings)
• Add another a new row, fill in some values, and refresh the page
  • Confirm that a dialog box warns about unsaved changes on the page

[xmedr]

The way that django is rendering these forms, there are multiple input elements with the same id like id_year, id_budget_0, etc. I tried instantiating the existing funding forms with different ids based off of their primary keys, but then couldn't figure out a solid way of selecting them to be invisible in css. (ex. id_budget_0 would turn into id_budget_test_0) Everything works regardless, but as of now I haven't found an elegant way to resolve that. I could do more digging on this here or open an issue and work on that in another branch, whichever is fine by me!

Also as of now, having a budget and actual cost of 0 is an invalid input. If zero can be a valid value for this field then I can definitely change this!

[xmedr]

@smcalilly gotcha! I also realized that the model allowed negative dollar amounts, so i changed the serializer to disallow that. is that alright?

[smcalilly]

@xmedr yep! good catch.