Fixes the sort dropdown goind outside of the screen

see gitlab-org/gitlab-ce#986

app/assets/stylesheets/generic/common.scss

@@ -54,6 +54,11 @@ pre {
   text-shadow: none;
 }
 
+.dropdown-menu-align-right {
+  left: auto;
+  right: 0px;
+}
+
 .dropdown-menu > li > a:hover,
 .dropdown-menu > li > a:focus {
   background: $bg_primary;

app/views/shared/_sort_dropdown.html.haml

@@ -6,7 +6,7 @@
     - else
       Newest
     %b.caret
-  %ul.dropdown-menu
+  %ul.dropdown-menu.dropdown-menu-align-right
     %li
       = link_to page_filter_path(sort: 'newest') do
         = sort_title_recently_created