In reference to customer request, please consider adding support for editing landing page placed outside root tree.

There is customer use case:

Actually we have all content in a subfolder which is content root as our customer wants to have flat urls, something like domain.tld/content-path. Having all articles in real root would make the content browser unusable.
However some service pages (and landing pages) are in "real root" above the content folder as we have a white-label feature implemented where white label customer of our customers have some custom pages (like imprint, contact etc).
We have a controller that injects siteaccess-aware the custom content.