Move files tab before commits tab to follow same order as top navigation

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

app/views/projects/show.html.haml

@@ -15,6 +15,9 @@
 .project-stats.row-content-block.second-block
   .container-fluid.container-limited
     %ul.nav
+      %li
+        = link_to project_files_path(@project) do
+          Files (#{repository_size})
       %li
         = link_to namespace_project_commits_path(@project.namespace, @project, current_ref) do
           #{'Commit'.pluralize(@project.commit_count)} (#{number_with_delimiter(@project.commit_count)})
@@ -24,9 +27,6 @@
       %li
         = link_to namespace_project_tags_path(@project.namespace, @project) do
           #{'Tag'.pluralize(@repository.tag_names.count)} (#{number_with_delimiter(@repository.tag_names.count)})
-      %li
-        = link_to project_files_path(@project) do
-          Files (#{repository_size})
 
       - if default_project_view != 'readme' && @repository.readme
         %li