It's seems the ability to save available page types via the admin mode is broken. I've updated to the latest release/nuget but everytime i change the settings and click the save button, nothing gets saved.
Does anyone else have the same issue and know if it's a bug?
For those interested... This has been confirmed by EPiServer as a bug that has been re-introduced. It was fixed in an earlier release, but is now an issue again. It's reported and will be fixed in a future release.