So the Desktop Icons NG (DING) extension was inhibiting the long press to right-click on the desktop. Sigh! Yet another extension I need that causes some unwanted shell issues.
I don’t know what’s going on with Nautilus. However, I don’t really care anymore! I was able to fix all of the KDE Plasma applications looking crappy in GNOME by setting the following environmental variable export QT_QPA_PLATFORMTHEME=‘kde’. This is what Dolphin looks like now on my GNOME desktop:
Sweet Jesus! I am never going back to Nautilus on GNOME!