Allow for setting a edit_cancel_redirect
Defaults to list view for the entity but can be overriden by setting
the parameter manually. Falls back to history.go(-1) if not set.
Patch by: Sverre Rabbelier
Coverage: code coverage testing for Python
Coverage.py is a Python module that measures code coverage during test execution.
It uses the code analysis tools and tracing hooks provided in the Python standard
library to determine which lines are executable, and which have been executed.
For more information, see http://nedbatchelder.com/code/modules/coverage.html