Move sort dropdown to the right

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

app/views/projects/issues/_issues.html.haml

@@ -78,7 +78,8 @@
                   %strong= milestone.title
                   %small.light= milestone.expires_at
 
-        = render 'shared/sort_dropdown'
+        .pull-right
+          = render 'shared/sort_dropdown'
 
 
   %ul.well-list.issues-list

app/views/projects/merge_requests/index.html.haml

@@ -60,7 +60,8 @@
                     %strong= milestone.title
                     %small.light= milestone.expires_at
 
-          = render 'shared/sort_dropdown'
+          .pull-right
+            = render 'shared/sort_dropdown'
 
       %ul.well-list.mr-list
         = render @merge_requests