Added Broken Cards to User Settings menu.

Thanks to xet7 !

client/components/users/userHeader.jade

@@ -21,6 +21,10 @@ template(name="memberMenuPopup")
         a.js-due-cards(href="{{pathFor 'due-cards'}}")
           i.fa.fa-calendar
           | {{_ 'dueCards-title'}}
+      li
+        a.js-broken-cards(href="{{pathFor 'broken-cards'}}")
+          i.fa.fa-chain-broken
+          | {{_ 'broken-cards'}}
       li
         a(href="{{pathFor 'home'}}")
           span.fa.fa-home