BSM2 GUI Variable Name Update

[MarcusHolly]

Fixes/Resolves:

Remaining checkbox in #1153

Legal Acknowledgement

By contributing to this software project, I agree to the following terms and conditions for my contribution:

1. I agree my contributions are submitted under the license terms described in the LICENSE.txt file at the top level of this directory.
2. I represent I am authorized to make the contributions and grant the license. If my employer has rights to intellectual property that includes these contributions, I represent that I have received permission to make contributions and grant the required license on behalf of that employer.

[luohezhiming]

LGTM

[adam-a-a]

LGTM - @MichaelPesce @dangunter we realized that when looking at sweep results, if we weren't particular about naming the output, there could be confusion between multiple outputs with the same name. For example, a concentration at the outlet of one unit should be distinguished from the same component concentration at the outlet of a different unit in the flowsheet.

TLDR: @MarcusHolly manually added category names in front of reported variable names to be able to distinguish between results. However, it might be better if this could be handled in the UI (i.e., for sweep results, display category and name for each entry).