- Handler for content fields.

- Relies on the Activated event to weld fields to parts.
- New event Initializing added to the content management lifecycle, old Activated event is now Initializing.
- Unifying part and field template result classes.
- Refactoring.

--HG--
branch : dev

src/Orchard.Web/Core/Navigation/Handlers/MenuPartHandler.cs

@@ -13,7 +13,7 @@ namespace Orchard.Core.Navigation.Handlers {
             Filters.Add(new ActivatingFilter<MenuPart>("menuitem"));
             Filters.Add(StorageFilter.For(menuPartRepository));
 
-            OnActivated<MenuPart>((ctx, x) => {
+            OnInitializing<MenuPart>((ctx, x) => {
                                       x.OnMainMenu = false;
                                       x.MenuText = String.Empty;
                                   });