Add back in the motif viz

[j6k4m8]

Closes #23

This approach uniquely colors graph elements in the motif visualization pane based upon the attributes and constraints of that vertex or edge.

[dxenes1]

Didn't want to block this since the implementation looks good and it seems to work on your end, but I'm unable to run a web-app dev server. I was running it without the motifstudio server so maybe that's the cause?

[j6k4m8]

@dxenes1 the easiest way to do this is to go into the API config and point it at the production server instead of the local backend dev server (uncomment this line).

For this particular PR it wouldn't be possible because there were backend changes as well that were required, but usually frontend changes won't need a backend dev server for debugging :)