Fixed alignment of download dropdown

With the new dropdown CSS - some dropdowns might look a bit odd

app/assets/stylesheets/framework/dropdowns.scss

@@ -9,6 +9,12 @@
   border-left: $caret-width-base solid transparent;
 }
 
+.btn-group {
+  .caret {
+    margin-left: 0;
+  }
+}
+
 .dropdown {
   position: relative;
 }

app/views/projects/repositories/_download_archive.html.haml

@@ -10,7 +10,7 @@
       %span.caret
       %span.sr-only
         Select Archive Format
-    %ul.col-xs-10.dropdown-menu{ role: 'menu' }
+    %ul.col-xs-10.dropdown-menu.dropdown-menu-align-right{ role: 'menu' }
       %li
         = link_to archive_namespace_project_repository_path(@project.namespace, @project, ref: ref, format: 'zip'), rel: 'nofollow' do
           %i.fa.fa-download