I have a filed a bug report for this. Browsing files with the admin:// URI scheme in Nemo or Nautilus is supposed to give me root access, but when I right click on files owned by root, I see that the menu lacks the Delete permanently button and the Move button is grayed out. This either a bug or an intentional design flaw. What’s the point of admin:// if I can’t even use it as if it were actually being run by root? Why does this limitation exist?
I could run sudo -H nemo or sudo -H nautilus, but this leaves it open in the terminal which is not proper GUI use, the interface is messed up in that it doesn’t have all the shortcuts and buttons, and any configurarion files it might create in $HOME (because -H runs it with the non-root user’s environment variables) will be owned by root. Is there any file browser that more properly integrates root privilege elevation?