fixes issue with legacy user.Password property and fixes comparison of sections

src/Umbraco.Web/Security/WebSecurity.cs

@@ -169,7 +169,7 @@ namespace Umbraco.Web.Security
             {
                 return true;
             }
-            return CurrentUser.Applications.Any(uApp => uApp.alias == app);
+            return CurrentUser.Applications.Any(uApp => uApp.alias.InvariantEquals(app));
         }
 
         internal void UpdateLogin(long timeout)

src/umbraco.businesslogic/User.cs

@@ -162,7 +162,7 @@ namespace umbraco.BusinessLogic
             }
             set
             {
-                _user.Language = value;
+                _user.Password = value;
             }
         }