Don't fail to render a datagrid for objects without get_absolute_url().

Review Request #7276 — Created May 1, 2015 and submitted — Latest diff uploaded

Information

Djblets
release-0.9.x
249461e...

Reviewers

A recent change for better responsive UI support in datagrids made the
assumption that objects always have a get_absolute_url() method. This
isn't always the case, though. Now, if that method is missing, we simply
return None.

Unit tests pass.