As a moderator I want to quickly see which of my meeting series contain un-finalzed minutes. (Also invited users might be interested!)

On the meeting series list, in the brackets with the last minutes date, after the date string show:

• the "glyphicon-ok" if the last minutes are finalized
• the "glyphicon-exclamation-sign" if the last minutes are un-finalized

Examples:
(last minutes of 2016-12-04 [place-icon-here])