Use more logic class names for buttons in panel headings

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

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

@@ -40,7 +40,7 @@
     .panel.panel-default
       .panel-heading
         Projects (#{@projects.total_count})
-        .pull-right
+        .panel-head-actions
           .dropdown.inline
             %a.dropdown-toggle.btn{href: '#', "data-toggle" => "dropdown"}
               %span.light sort:

app/views/admin/users/index.html.haml

@@ -31,7 +31,7 @@
     .panel.panel-default
       .panel-heading
         Users (#{@users.total_count})
-        .pull-right
+        .panel-head-actions
           = link_to 'New User', new_admin_user_path, class: "btn btn-new"
       %ul.well-list
         - @users.each do |user|