Merge commit from fork

* Fixed parsing of node if in content and media permission querystring handlers to retrieve expected value when multiple are provided in the querystring.

* Add HttpPost attributes to backoffice endpoints that should only accept post requests.

* Bumped version to 13.6.1.

* Narrow PermissionQueryString parsing to the releveant UmbracoObjectType

* Add missed update from v10

---------

Co-authored-by: Sven Geusens <sge@umbraco.dk>

src/Umbraco.Web.BackOffice/Controllers/ContentController.cs

@@ -256,6 +256,7 @@ public class ContentController : ContentControllerBase
     ///     Permission check is done for letter 'R' which is for <see cref="ActionRights" /> which the user must have access to
     ///     update
     /// </remarks>
+    [HttpPost]
     public async Task<ActionResult<IEnumerable<AssignedUserGroupPermissions?>?>> PostSaveUserGroupPermissions(
         UserGroupPermissionsSave saveModel)
     {
@@ -902,6 +903,7 @@ public class ContentController : ContentControllerBase
     [Authorize(Policy = AuthorizationPolicies.TreeAccessDocumentTypes)]
     [FileUploadCleanupFilter]
     [ContentSaveValidation(skipUserAccessValidation:true)] // skip user access validation because we "only" require Settings access to create new blueprints from scratch
+    [HttpPost]
     public async Task<ActionResult<ContentItemDisplay<ContentVariantDisplay>?>?> PostSaveBlueprint(
         [ModelBinder(typeof(BlueprintItemBinder))] ContentItemSave contentItem)
     {
@@ -939,6 +941,7 @@ public class ContentController : ContentControllerBase
     [FileUploadCleanupFilter]
     [ContentSaveValidation]
     [OutgoingEditorModelEvent]
+    [HttpPost]
     public async Task<ActionResult<ContentItemDisplay<ContentVariantScheduleDisplay>?>> PostSave(
         [ModelBinder(typeof(ContentItemBinder))] ContentItemSave contentItem)
     {
@@ -2089,6 +2092,7 @@ public class ContentController : ContentControllerBase
     ///     does not have Publish access to this node.
     /// </remarks>
     [Authorize(Policy = AuthorizationPolicies.ContentPermissionPublishById)]
+    [HttpPost]
     public IActionResult PostPublishById(int id)
     {
         IContent? foundContent = GetObjectFromRequest(() => _contentService.GetById(id));
@@ -2120,6 +2124,7 @@ public class ContentController : ContentControllerBase
     ///     does not have Publish access to this node.
     /// </remarks>
     [Authorize(Policy = AuthorizationPolicies.ContentPermissionPublishById)]
+    [HttpPost]
     public IActionResult PostPublishByIdAndCulture(PublishContent model)
     {
         var languageCount = _allLangs.Value.Count();
@@ -2243,6 +2248,7 @@ public class ContentController : ContentControllerBase
     /// </summary>
     /// <param name="sorted"></param>
     /// <returns></returns>
+    [HttpPost]
     public async Task<IActionResult> PostSort(ContentSortOrder sorted)
     {
         if (sorted == null)
@@ -2294,6 +2300,7 @@ public class ContentController : ContentControllerBase
     /// </summary>
     /// <param name="move"></param>
     /// <returns></returns>
+    [HttpPost]
     public async Task<IActionResult?> PostMove(MoveOrCopy move)
     {
         // Authorize...
@@ -2333,6 +2340,7 @@ public class ContentController : ContentControllerBase
     /// </summary>
     /// <param name="copy"></param>
     /// <returns></returns>
+    [HttpPost]
     public async Task<ActionResult<IContent>?> PostCopy(MoveOrCopy copy)
     {
         // Authorize...
@@ -2372,6 +2380,7 @@ public class ContentController : ContentControllerBase
     /// <param name="model">The content and variants to unpublish</param>
     /// <returns></returns>
     [OutgoingEditorModelEvent]
+    [HttpPost]
     public async Task<ActionResult<ContentItemDisplayWithSchedule?>> PostUnpublish(UnpublishContent model)
     {
         IContent? foundContent = _contentService.GetById(model.Id);
@@ -3096,6 +3105,7 @@ public class ContentController : ContentControllerBase
         return notifications;
     }
 
+    [HttpPost]
     public IActionResult PostNotificationOptions(
         int contentId,
         [FromQuery(Name = "notifyOptions[]")] string[] notifyOptions)