add comment to explain the invisible username label (it confused the heck out of me until I realised)

views/options/social/chat-message.jade

@@ -4,6 +4,7 @@ li.chat-message(ng-repeat='message in group.chat', ng-class=':: {highlight: isUs
       a.label.label-default.chat-message.hidden-label
         span {{::message.user}} 
         span(ng-class='userAdminGlyphiconStyleFromLevel(message.contributor.level)')
+        // this invisible username label is here to push the message text far enough right that the visible label can be floated to this point without covering up any of the text
     markdown(ng-model='::message.text')
     | -
     span.muted.time(from-now='::message.timestamp')