Unify contact icons to FontAwesome

www/common/application_config_internal.js

@@ -113,7 +113,7 @@ define(function() {
         poll: 'cptools-poll',
         whiteboard: 'cptools-whiteboard',
         todo: 'cptools-todo',
-        contacts: 'cptools-contacts',
+        contacts: 'fa-address-book',
         kanban: 'cptools-kanban',
         oodoc: 'fa-file-word-o',
         ooslide: 'fa-file-powerpoint-o',

www/common/common-ui-elements.js

@@ -2438,7 +2438,7 @@ define([
                 attributes: {
                     'target': '_blank',
                     'href': origin+'/contacts/',
-                    'class': 'cptools cptools-contacts'
+                    'class': 'fa fa-address-book'
                 },
                 content: h('span', Messages.type.contacts)
             });