Layout navigation should respect layout width settings

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

app/assets/stylesheets/framework/nav.scss

@@ -185,11 +185,3 @@
     }
   }
 }
-
-.layout-nav {
-  margin-bottom: 5px;
-
-  .nav-links {
-    padding: 0 $gl-padding;
-  }
-}

app/views/layouts/_page.html.haml

@@ -27,6 +27,7 @@
     = yield :flash_message
     - if defined?(nav) && nav
       .layout-nav
+        %div{ class: container_class }
           = render "layouts/nav/#{nav}"
     %div{ class: (container_class unless @no_container) }
       .content