Help window not working
I just built the system monitor on commit c7d335c3 and while the Keyboard Shortcuts window is working fine, the help window just doesn't open.
Instead it just writes this to the log:
** (gnome-system-monitor:2776): WARNING **: 20:05:50.869: Could not display help : Operation not supported
I tried rebuilding it a few times, but that did not have any effect.