Merge branch 'notification-levels' into 'master'

Notification levels can now be set on the Project's main page

![Screen_Shot_2015-09-16_at_7.49.49_PM](https://gitlab.com/gitlab-org/gitlab-ce/uploads/0ac517bdfdc801f0e2115463c3ea9e10/Screen_Shot_2015-09-16_at_7.49.49_PM.png)

The notification settings for a project can now be set directly on the Project's page. The drop down list and the button label reflect the current level.

Saving is done via a remote form submission and if successful shows the user a flash message:

![Screen_Shot_2015-09-16_at_6.09.02_PM](https://gitlab.com/gitlab-org/gitlab-ce/uploads/8a6e1fde5177aa3976cadf59fdb8d375/Screen_Shot_2015-09-16_at_6.09.02_PM.png)

@DouweM can you please review my code. I gave my bestest effort to make in clean and readable.

@rspeicher hopefully we can include it with the 8.0 release, maybe?

/cc @darby 

See merge request !1322

1 files changed, 19 insertions, 2 deletions

diff --git a/app/models/notification.rb b/app/models/notification.rb
index 1395274173d..171b8df45c2 100644
--- a/app/models/notification.rb
+++ b/app/models/notification.rb
@@ -12,7 +12,7 @@ class Notification
 
   class << self
     def notification_levels
-      [N_DISABLED, N_PARTICIPATING, N_WATCH, N_MENTION]
+      [N_DISABLED, N_MENTION, N_PARTICIPATING, N_WATCH]
     end
 
     def options_with_labels
@@ -26,7 +26,7 @@ class Notification
     end
 
     def project_notification_levels
-      [N_DISABLED, N_PARTICIPATING, N_WATCH, N_GLOBAL, N_MENTION]
+      [N_DISABLED, N_MENTION, N_PARTICIPATING, N_WATCH, N_GLOBAL]
     end
   end
 
@@ -57,4 +57,21 @@ class Notification
   def level
     target.notification_level
   end
+  
+  def to_s
+    case level
+    when N_DISABLED
+      'Disabled'
+    when N_PARTICIPATING
+      'Participating'
+    when N_WATCH
+      'Watching'
+    when N_MENTION
+      'On mention'
+    when N_GLOBAL
+      'Global'
+    else
+      # do nothing      
+    end
+  end
 end