clean-up of edit biomes display

[teixeirak]

@caseyhofford

Below is a screenshot of the edit ecosystems display.

I'd like to make two minor (and hopefully very easy) changes:

• remove the "source" boxes, as they aren't currently used. Please keep the structure to make them in the code, as the eventual ideal is to show the source and allow users to be able to select an alternate source.
• replace -9999 error values with NA or blanks (better yet, can I replace it with NA or blanks in biome_defaults.csv without causing problems for the code?).

[caseyhofford]

@teixeirak I have tried removing all values of -9999 from both the frontend and backend but haven't had any luck changing the default values in these fields. Is it possible these data points are coming from the netcdf data?

[teixeirak]

@caseyhofford , I believe they're coming from biome_defaults.csv. Can I replace them with blanks or NA in that file without causing problems for the code?