Fix keywords widget for Django 1.11. Closes #1844.
Fix keywords widget for Django 1.11. Closes #1844.

readevalprint/mezzanine,stephenmcd/mezzanine,christianwgd/mezzanine,dsanders11/mezzanine,frankier/mezzanine,stephenmcd/mezzanine,readevalprint/mezzanine,frankier/mezzanine,frankier/mezzanine,molokov/mezzanine,dsanders11/mezzanine,wbtuomela/mezzanine,dsanders11/mezzanine,molokov/mezzanine,molokov/mezzanine,wbtuomela/mezzanine,jerivas/mezzanine,christianwgd/mezzanine,jerivas/mezzanine,readevalprint/mezzanine,wbtuomela/mezzanine,jerivas/mezzanine,stephenmcd/mezzanine,christianwgd/mezzanine