Merge branch 'zj-fix-time-ago-tooltip-chat-names' into 'master'

Evalute time_ago method instead of printing it

![Screen_Shot_2016-11-21_at_21.00.34](/uploads/295ffa522865fe1865b0c0b552a49ebf/Screen_Shot_2016-11-21_at_21.00.34.png)

See merge request !7634

app/views/profiles/chat_names/_chat_name.html.haml

@@ -19,7 +19,7 @@
     = chat_name.chat_name
   %td
     - if chat_name.last_used_at
-      time_ago_with_tooltip(chat_name.last_used_at)
+      = time_ago_with_tooltip(chat_name.last_used_at)
     - else
       Never