Fix broken url_for
Fix broken url_for

proyectos-analizo-info/pybossa-analizo-info-default-theme,khadgarmage/pybossa-stardust-theme,AltClick/pybossa-amnesty-theme,PyBossa/pybossa-default-theme,jeffersonrpn/pybossa-contribua-theme,CRUKorg/pybossa-cruk-theme,PyBossa/pybossa-default-theme,spMohanty/geotagx-theme,proyectos-analizo-info/pybossa-analizo-info-default-theme,CRUKorg/pybossa-cruk-theme,proyectos-analizo-info/pybossa-analizo-info-default-theme,spMohanty/geotagx-theme,jeffersonrpn/pybossa-contribua-theme,spMohanty/geotagx-theme,jeffersonrpn/pybossa-contribua-theme,Scifabric/mrallergen-theme,geotagx/geotagx-theme,spMohanty/geotagx-theme,geotagx/geotagx-theme,geotagx/geotagx-theme,PyBossa/mrallergen-theme,AltClick/pybossa-amnesty-theme,PyBossa/mrallergen-theme,CRUKorg/pybossa-cruk-theme,khadgarmage/pybossa-stardust-theme,Scifabric/mrallergen-theme