[gtk/BUG_modelbutton_focus_on_click_GTK3] GtkModelButton: set focus-on-click to FALSE

[Nelson Benítez León <nbenitez src gnome org>]

commit 947c035f7c805edc2b4f55b0799ac6ba05edd73a
Author: Nelson Benítez León <nbenitezl gmail com>
Date:   Thu Apr 2 12:21:44 2020 -0400

    GtkModelButton: set focus-on-click to FALSE
    
    same as GtkMenuButton, GtkScaleButton
    and GtkVolumeButton.
    
    Related to issue #2555

 gtk/gtkmodelbutton.c | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/gtk/gtkmodelbutton.c b/gtk/gtkmodelbutton.c
index 4653cff7bf..e70dcf4b85 100644
--- a/gtk/gtkmodelbutton.c
+++ b/gtk/gtkmodelbutton.c
@@ -1287,6 +1287,7 @@ gtk_model_button_init (GtkModelButton *button)
 
   button->role = GTK_BUTTON_ROLE_NORMAL;
   gtk_button_set_relief (GTK_BUTTON (button), GTK_RELIEF_NONE);
+  gtk_widget_set_focus_on_click (GTK_WIDGET (button), FALSE);
   button->box = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 6);
   gtk_widget_set_halign (button->box, GTK_ALIGN_FILL);
   gtk_widget_show (button->box);