Reported fresh bug 1807766 to launchpad as the answer to this AskUbuntu question.
Another fresh discovery for 18.04 LTS (!!!) and 18.10 is that user can not install deb-packages with GDebi Package Installer from Desktop. See question on AskUbuntu and bug 1807761 at launchpad.
What are you doing?
Why I can’t simply copy desktop-file from /usr/share/applications, make and executable and show its icon on the desktop?
Why I get blind icon ( )
instead of normal one ( )?
Why are you inventing extensions over extensions over extensions?
Such functionality was here for years!
Are you sure that you can teach all business oriented users with new non-intuitive habits?
For whom are you developing this enterprise grade operating system with 10 years support?