Add Relationship for Multiple Terms from Views Context Display

Currently, there is a relationship handler that will create a taxonomy term context from a single row in a view context. I need to be able to pass all the term IDs from the view context into a pane, concatenated by either a '+' (or) or a ',' (and).

To do this, I copied the term_from_view ctools plugin for views_content relationships to terms_from_view and modified it accordingly so it will create a context of multiple terms instead of a single term. The form also has the option for choosing 'AND' or 'OR' as the concatenator.