Handle submit button during query fetch

[d-rita]

What does this PR do?

• After a person has submitted a query via the mapathon report pages and/or user group report page, the button is now replaced with a loading spinner until the API calls are done and a response is got.

Issues:

• Fixes Disable Submit Query Button until result is returned  #120

How to test:

• Fetch and checkout the branch using git fetch origin && git checkout fix/button-interactivity
• Start the server using npm start
• Go to either the mapathon or user group report pages and test with any query.
• After hitting submit, the button is replaced with a spinner. When the results are back, the submit button reappers.

Screenshot: