Updated mediawiki/extensions
Project: mediawiki/extensions/MassMessage  6dee216770cfd4bec3077640c5f4bbaf6ae4eb2d

Output the number of recipients on preview

This is basically a rebase of Ia052b3deba0b4d463e9cbaca7338b64865f101ea

Bug: 57472
Change-Id: I342f1e61bbb0254027de173c534ab064e6e89fca