Comment 70 for bug 1794494

Grabbed an old VM, not updated since installing 18.04.1. 307 pending updates. I did not remember selecting -Proposed on that VM, but Discover wanted to update to, among other things, Plasma 5.12.7. I got the notification that a restart would be required, and after re-booting my VM, kinfocenter reported Plasma 5.12.7, KDE FW 5.44.0, and Qt 5.9.5. Discover had a black box for Pre-released updates, unlike the check marks for Important, Recommended, and Unsupported updates. Changing the black box to a check mark and reloading Discover's cache still gave me no updates. Same with apt full-upgrade (nothing to do). So, I successfully tested Apps include: krunner, the Application Launcher, Discover, System Settings, System Monitor, Konsole, Kate, Firefox, and LibreOffice writer. No issues.