The flowbox demo is otherwise less than useful,
if /usr/share/gnome/backgrounds isn't present.
At the same time, give the scale in the listbox
some function.
The designers wanted the frame column gone for a long
time, since inset/outset/groove etc are not the coolest
features anymore.
Keep one frame, and put a GtkVideo in it.
This opens up some real estate on page 1. Suggestions
welcome for how to fill it.
GNOME Shell 3.32 will remove support for the app menu
so we need to move its contents to the primary (hamburger)
menu.
widget-factory already had a primary menu.
The only item in the app menu was About.
https://gitlab.gnome.org/GNOME/Initiatives/issues/4
This commit add some more keyboard shortcuts to gtk3-widget-factory,
and adds a help overlay documenting them. This examle uses the
automatic resource loading support in GtkApplication.
