Allows additional transition starting states #4407

From redmine issue [#4407](https://code.bioinformatics.northwestern.edu/issues/issues/show/4407)

Will also need to be cherry picked into a release that is deployed to WROC and UCD, in reference to:

* [Assessment Feature #4202](https://code.bioinformatics.northwestern.edu/issues/issues/show/4202)
* [Assessment Feature #4373](https://code.bioinformatics.northwestern.edu/issues/issues/show/4373)