change translation for dashboard bulk_email setting button
change translation for dashboard bulk_email setting button

WatanabeYasumasa/edx-platform,yokose-ks/edx-platform,yokose-ks/edx-platform,WatanabeYasumasa/edx-platform,yokose-ks/edx-platform,yokose-ks/edx-platform,WatanabeYasumasa/edx-platform,WatanabeYasumasa/edx-platform,yokose-ks/edx-platform