flow inspector: context window should show something if the variable is imported

[mmrj]

an example is a Python model, where you create the run with "model.py", and early in model.py there is an "import vars" statement and your "vars.py" file is where the variables are defined.

so the UI has things like data-f-bind="vars.currentRound" ... and clicking on them shows nothing in the context window. it would be nice if something appeared -- maybe an error/info note, or maybe the import statement.