Speed up app
I was able to speed up the map loading on a small example here:
https://code.usgs.gov/water/users/ldecicco/mi-gww
The way I did the reactive data in that example is how I've found it to be most efficient in the past. To follow the pattern for this package might take a bit of refactoring, but I wanted to leave this paper trail while it's still in my head.