/home/user name/.local/share/file-manager/actions
create root.desktop
[Desktop Entry]
Type=Action
Tooltip=Open Folder As Root
Name=Open Folder As Root
Profiles=profile-zero;
Icon=gtk-dialog-authentication
[X-Action-Profile profile-zero]
MimeTypes=inode/directory;
Exec=/usr/bin/gksu /usr/bin/pcmanfm %u
Name=Default profile