Revert "Cleans up BackofficeSecurity, fixes up AuthenticationController for endpoints that aren't authorized (and simplifies)"

Signed-off-by: Bjarke Berg <mail@bergmania.dk>

src/Umbraco.Web.Common/ApplicationModels/AuthenticateAsBackOfficeSchemeConvention.cs

@@ -0,0 +1,16 @@
+using Microsoft.AspNetCore.Mvc.ApplicationModels;
+using Umbraco.Web.Common.Filters;
+
+namespace Umbraco.Web.Common.ApplicationModels
+{
+    /// <summary>
+    /// Ensures all requests with this convention are authenticated with the back office scheme
+    /// </summary>
+    public class AuthenticateAsBackOfficeSchemeConvention : IActionModelConvention
+    {
+        public void Apply(ActionModel action)
+        {
+            action.Filters.Add(new EnsureUmbracoBackOfficeAuthentication());
+        }
+    }
+}

src/Umbraco.Web.Common/ApplicationModels/BackOfficeApplicationModelProvider.cs

@@ -17,7 +17,8 @@ namespace Umbraco.Web.Common.ApplicationModels
         {
             ActionModelConventions = new List<IActionModelConvention>()
             {
-                new BackOfficeIdentityCultureConvention()
+                new BackOfficeIdentityCultureConvention(),
+                new AuthenticateAsBackOfficeSchemeConvention()
             };
         }