[gnome-robots/arnaudb/wip/gtk4: 24/32] Show the window.

[Arnaud B. <arnaudb src gnome org>]

commit a509aabf86a7378e87e235bb5c2ac83068066fbb
Author: Arnaud Bonatti <arnaud bonatti gmail com>
Date:   Mon May 25 21:41:58 2020 +0200

    Show the window.

 src/gnome-robots.c | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/src/gnome-robots.c b/src/gnome-robots.c
index 204cea4..5004685 100644
--- a/src/gnome-robots.c
+++ b/src/gnome-robots.c
@@ -495,6 +495,8 @@ activate (GtkApplication *app, gpointer user_data)
   init_game ();
 
   g_settings_sync ();
+
+  gtk_window_present (GTK_WINDOW (window));
 }
 
 /**