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