When I create a subfolder of an XPage folder that folder becomes an XPage folder as well

As a cms user
when I create a new subfolder of a folder
and that folder has been marked as XPage folder
and that folder is associated with a channel of the Experience Manager
then the subfolder is also an XPage folder
and that subfolder is associated with the same channel as the folder

A folder has been marked as XPage folder if it has the following mixin:

[hippostd:xpagefolder] mixin
+ hippostd:channelid string