Extension tool displayed in menu
GNOME Shell 3.36 introduced extension tool.
It makes no sense in context of Flashback so it should probably be excluded from the menu. It already has OnlyShowIn=GNOME;
:
https://gitlab.gnome.org/GNOME/gnome-shell/-/blob/3.36.0/data/org.gnome.Extensions.desktop.in.in
so it probably needs to be excluded here.