Merge branch '17485-broadcast-msg' into 'master'

Move broadcast msg into content-wrapper

Closes #17485  

<img src="/uploads/ab365f471209c55d2ee876cf558d4032/Screen_Shot_2016-05-12_at_4.21.22_PM.png" width="800px">

See merge request !4132

app/views/layouts/_page.html.haml

 .page-with-sidebar{ class: "#{page_sidebar_class} #{page_gutter_class}" }
-  = render "layouts/broadcast"
   .sidebar-wrapper.nicescroll{ class: nav_sidebar_class }
     .header-logo
       %a#logo
@@ -27,6 +26,7 @@
       .container-fluid
         = render "layouts/nav/#{nav}"
   .content-wrapper{ class: ('page-with-layout-nav' if defined?(nav) && nav) }
+    = render "layouts/broadcast"
     = render "layouts/flash"
     = yield :flash_message
     %div{ class: (container_class unless @no_container) }