Updated mediawiki/extensions
Project: mediawiki/extensions/MediaWikiChat  73ef00eea87faed67110ec83e57220bc7df1b4b2

Fix problem with columnn widths

If the first message you recieve in a chat window is a join/leave/other
sytem message, the column widths will be distorted. Adding a blank normal
message, that won't be seen, fixes.

Change-Id: I1fc8da472b172dd4a3f3cd38c10a97e8c94cd768