In Ubuntu Gnome 19.04:
A total of two.
Where is the freedom, and the ease of use and convenience of drag and drop,
and ability to easily use apps on the desktop, without the intrusion of the favorites dock or dash,
and the ugly and awkward caveman dash and dock that does not even work.
In 19.04 Gnome a desktop link is reduced to a text file, when you click on it.
So no easy way to do anything, why not get rid of the gnome desktop altogether , since the developers do not really want anyone to use it.
Windows 10 users would flee in horror when trying to use Ubuntu gnome 19.04 desktop.
Do you really want billions of user to stay with Microsoft, or do you want them to switch to Ubuntu?