Updated mediawiki/extensions
Project: mediawiki/extensions/MassMessage  b3daa7650164a4b74c5ce5c7a450237ea9efc57c

Add a little CSS to format the save/preview buttons on the same line

This also re-orders them so the Save button comes before Preview,
just like how it is on a normal edit page.

They are loaded as two different modules so users who have
JavaScript disabled will still receive the CSS.

Change-Id: I76243a2f82a340b4943954566d0127088447c574