simplify gtk button code newapi

make headerbar buttons flat (GTK) newapi

add headerbar (GTK) newapi

simplfy macro usage in container.c (GTK) newapi

fix gtk box margin newapi

fix gtk3/4 grid hexpand/vexpand setting newapi

(0) -300 -100 -30 -10 -6 +6 +10 tip

mercurial