[not bug] Small 2.2.9 issues

[micheus]

More of a pain is you can't close the image view panel, the "X" isn't clickable, and there's no close option on the taskbar.

I see.
The title and "X" button were placed on the wrong place on screen. Did you tried to click on the supposed place the "X" should be, instead of on it?

It looks like something related to the desktop your distro is using (GNOME, Cinnamon / MATE / KDE SC 4 / Xfce) - which one is your system using?

Ubuntu is using GNOME - I built and ran Wings3d last year in Ubuntu 20.04 with no issues like that.
Of course, that is related to a possible issue of wxWidgets in that desktop - not to Wings3D itself.