Connect the Dots - bipartite bug

[kanarinka]

Pasting or uploading data from our restaurant activity template into CtD created different results for different workshop groups. The activity should create a bipartite graph. In some cases, it was created and colored properly. In other cases, it was not. Difference seemed to be in whether they downloaded the data and uploaded a file vs pasted it. Need to dig in a little more and fix bc the folks who didn't get the bipartite colored network were pretty confused about how to interpret the results.