Fixing some admin blog views

The titles should be set using Layout.Title

--HG--
branch : 1.x

src/Orchard.Web/Modules/Orchard.Blogs/Views/BlogAdmin/Item.cshtml

@@ -1,5 +1,5 @@
 @{
-    Html.AddTitleParts(T("Manage Blog").ToString());
+    Layout.Title = T("Manage Blog").ToString();
 }
     @* Model is a Shape, calling Display() so that it is rendered using the most specific template for its Shape type *@
     @Display(Model)

src/Orchard.Web/Modules/Orchard.Blogs/Views/Content-Blog.DetailAdmin.cshtml

@@ -1,7 +1,8 @@
 @using Orchard.Blogs.Extensions;
 @using Orchard.Blogs.Models;
+@using Orchard.ContentManagement
 
-@{ Layout.Title = (string)Model.Title; }
+@{ Layout.Title = T("Manage {0}", Html.ItemDisplayText((IContent)Model.ContentItem)); }
 
 @Display(Model.Header)
 @Display(Model.Actions)

src/Orchard.Web/Modules/Orchard.Blogs/Views/Content-Blog.Edit.cshtml

@@ -1,6 +1,6 @@
 @using Orchard.Mvc.Html;
 @{
-    Html.AddTitleParts((string)Model.Title);
+    Layout.Title = T("New Blog");
 }
 <div class="edit-item">
     <div class="edit-item-primary">