.desktop files not displayed or executed correctly in 3.30
The bug has been initially reported on https://bugs.launchpad.net/ubuntu/+source/nautilus/+bug/1812746
"I told VirtualBox to create a desktop icon for one of my virtual machines. It worked just fine in cosmic.
After upgrading to disco, however, instead of showing up as an icon, it shows up as a ".desktop" text file, and double-clicking it just opens the text file in gedit.
I tried deleting and recreating the icon in VirtualBox, and that didn't help."