Flash messages

app/views/layouts/management.html.slim

@@ -15,7 +15,8 @@ html
     = stylesheet_link_tag "management/application"
     = csrf_meta_tags
   body
-    = render partial: 'layouts/management/navigation'
+    = render 'layouts/management/navigation'
     main
+      = render 'layouts/management/flash'
       == yield
     = javascript_include_tag "management/application"

app/views/layouts/management/_flash.html.slim

@@ -0,0 +1,9 @@
+.row
+  .col-lg-12
+    - if flash[:notice]
+      .alert.alert-success
+        = flash[:notice]
+
+    - if flash[:alert]
+      .alert.alert-error
+        = flash[:alert]

app/views/management/conferences/edit.html.slim

@@ -1,6 +1,7 @@
 - content_for :title
   => t 'actions.edit.title', model: Conference.model_name.human
   = @conference.title
+
 .row
   .col-lg-12
     = render partial: 'form'