Show a modal after editing a single mapping

* Use flash messaging to pass through mapping IDs we can later re-use
* Fix the tag feature which broke in the process (multiple mappings
tables)
  * Create a way of distinguishing between the two and of addressing
exact mappings
Toggle display of mapping table components

* Hide bulk add and footer when showing a modal
Redirect to prior page after editing single

* Return to the context that you left when editing a single mapping
Show modal after bulk editing or tagging