[gedit] App: fix GtkWindow default icon name

[Sébastien Wilmet <swilmet src gnome org>]

commit 40ea48c7f901068d2704cf2137e8758cda877cf1
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Mon Apr 6 14:25:57 2020 +0200

    App: fix GtkWindow default icon name
    
    Fixes https://gitlab.gnome.org/GNOME/gedit/issues/147

 gedit/gedit-app.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/gedit/gedit-app.c b/gedit/gedit-app.c
index 50e3938ac..105773301 100644
--- a/gedit/gedit-app.c
+++ b/gedit/gedit-app.c
@@ -1272,7 +1272,7 @@ static void
 gedit_app_init (GeditApp *app)
 {
        g_set_application_name ("gedit");
-       gtk_window_set_default_icon_name ("gedit");
+       gtk_window_set_default_icon_name ("org.gnome.gedit");
 
        g_application_add_main_option_entries (G_APPLICATION (app), options);
 }