move burndown chart before user action hints

app/views/projects/milestones/show.html.haml

@@ -49,6 +49,8 @@
             = preserve do
               = markdown_field(@milestone, :description)
 
+  = render 'shared/milestones/burndown', milestone: @milestone, project: @project
+
   - if can?(current_user, :read_issue, @project) && @milestone.total_items_count(current_user).zero?
     .alert.alert-success.prepend-top-default
       %span Assign some issues to this milestone.
@@ -56,6 +58,5 @@
     .alert.alert-success.prepend-top-default
       %span All issues for this milestone are closed. You may close this milestone now.
 
-  = render 'shared/milestones/burndown', milestone: @milestone, project: @project
   = render 'shared/milestones/tabs', milestone: @milestone
   = render 'shared/milestones/sidebar', milestone: @milestone, project: @project, affix_offset: 153