I've been working on a rails development tool to show the references to particular partials. Below is an example for the show_for_student partial:
basically this says:
portal/clazzes/show_for_student is referred to by portal/clazzes/list_for_student which is referred to by portal/students/show which is referred to by both home/student which is referred to by home/index portal/students/show
The code for generating this up here: https://github.com/scytacki/rails-ref-tree
It doesn't support themes, but I want to add that to solve my original problem (ITSISU bin view)
It also has some hard coded paths so you need to generalize it to run it locally.