Merge branch 'winh-navcontrols-dropdown-style' into 'master'

Make sort by dropdown style consistent

See merge request !13253

app/assets/stylesheets/framework/nav.scss

@@ -161,6 +161,8 @@
   }
 
   .nav-controls {
+    @include new-style-dropdown;
+
     display: inline-block;
     float: right;
     text-align: right;

app/views/help/ui.html.haml

@@ -189,7 +189,7 @@
             = icon('chevron-down')
           %ul.dropdown-menu
             %li
-              %a Sort by date
+              = link_to 'Sort by date', '#'
 
         = link_to 'New issue', '#', class: 'btn btn-new btn-inverted'