xfce VNC environment no longer has control bar menus for screens (no close, or maximize panel)

This is one of the known 20.04 issues mentioned in the release notes. "Window decorations are not displayed with tightvncserver. Users depending on VNC are advised to wait until 20.04.1 or use an alternative window manager for VNC until this is resolved."

Here is the bug report about it. https://bugs.launchpad.net/ubuntu/+source/xfwm4/+bug/1860921


I fixed it by installing xfwm4 4.14.5 from here. It was not usable without the fix. (If the link breaks again, please try doing a Google search on "xfwm4_4.14.5-1_amd64.deb").