Configured to allow unselecting items so we have a way of choosing an
item if it is the only one in the list.
Signed-off-by: Anna Schumaker <Anna@NoWheyCreamery.com>
I can't inherit from Gtk.TreeListModel since the new() constructor is
the only way to set the create_child_func. Instead, use this wrapper
function to do the same thing.
Signed-off-by: Anna Schumaker <Anna@NoWheyCreamery.com>