Feature: #83608 - Page TSconfig setting "options.defaultUploadFolder" added

See forge#83608


A new page TSconfig option options.defaultUploadFolder is added.


Identical to the user TSconfig setting options.defaultUploadFolder, this allows default upload folder per page to be set.

If specified and the given folder exists, this setting will override the value defined in user TSconfig.


# Set default upload folder to "fileadmin/page_upload" on PID 1
[page["uid"] == 1]
    options.defaultUploadFolder = 1:/page_upload/