move project new snippet button into snippet scope navigation header

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

 - page_title "Snippets"
 
 - if current_user
+  .top-area
     .nav-links.snippet-scope-menu
       %li{ class: ("active" unless params[:scope]) }
         = link_to namespace_project_snippets_path(@project.namespace, @project) do
@@ -27,12 +28,15 @@
           %span.badge
             = @project.snippets.are_public.count
 
-.sub-header-block
+    .nav-controls.hidden-xs
       - if can?(current_user, :create_project_snippet, @project)
-    = link_to new_namespace_project_snippet_path(@project.namespace, @project), class: "btn btn-new btn-wide-on-sm pull-right", title: "New snippet" do
+        = link_to new_namespace_project_snippet_path(@project.namespace, @project), class: "btn btn-new", title: "New snippet" do
           New snippet
 
-  .oneline
-    Share code pastes with others out of git repository
+- if can?(current_user, :create_project_snippet, @project)
+  .visible-xs
+     
+    = link_to new_namespace_project_snippet_path(@project.namespace, @project), class: "btn btn-new btn-block", title: "New snippet" do
+      New snippet
 
 = render 'snippets/snippets'