fix use_messages heading in config screen (closes foodcoops#319)

lib/foodsoft_messages/app/overrides/admin/configs/_tab_messages/add_config.html.haml.deface

@@ -1,4 +1,4 @@
 / insert_bottom ':root:last-child'
-= config_use_heading form, :use_messages, label: 'Messages' do
+= config_use_heading form, :use_messages do
   = config_input form, :mailing_list, as: :string, input_html: {class: 'input-xlarge'}
   = config_input form, :mailing_list_subscribe, as: :string, input_html: {class: 'input-xlarge'}

lib/foodsoft_messages/config/locales/en.yml

@@ -17,6 +17,15 @@ en:
     users:
       show:
         send_message: Send message
+  config:
+    hints:
+      mailing_list: Mailing-list email address to use instead of the messaging system for mail to all members.
+      mailing_list_subscribe: Email address where members can send an email to for subscribing.
+      use_messages: Allow members to communicate with each other within Foodsoft.
+    keys:
+      use_messages: Messages
+      mailing_list: Mailing-list
+      mailing_list_subscribe: Mailing-list subscribe
   helpers:
     messages:
       write_message: Write message