Update font awesome to v4.7.

services/web/public/stylesheets/style.less

@@ -1,6 +1,6 @@
 // Core variables and mixins
 @import "core/variables.less";
-@import url(https://netdna.bootstrapcdn.com/font-awesome/4.2.0/css/font-awesome.min.css);
+@import url(https://netdna.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css);
 
 @import "core/mixins.less";