Disconnecting a cable from a device component does not pass return URL

[jeremystretch]

Environment

• Python version: 3.6.9
• NetBox version: 2.10.0

Steps to Reproduce

1. View a device with at least one interface with a cable attached to it.
2. Click the red "Remove cable" button to delete the cable and confirm its deletion

Expected Behavior

The cable should be deleted and the user should return to the device view.

Observed Behavior

The cable is deleted, but the user is redirected to the cables list view because no return_url is passed.