[gedit] gedit-app: don't use deprecated gtk_show_uri

[Jeremy Bicha <jbicha src gnome org>]

commit ae480e6d6fe4ee96cdd3fe4532dde5be5970b97e
Author: humbdi <h4mbdid4mdi gmx fr>
Date:   Wed Dec 13 15:56:25 2017 +0100

    gedit-app: don't use deprecated gtk_show_uri
    
    gtk_show_uri_on_window is recommended in gtk+ 3.22+
    
    https://developer.gnome.org/gtk3/stable/gtk3-Filesystem-utilities.html#gtk-show-uri-on-window
    
    https://bugzilla.gnome.org/show_bug.cgi?id=791565

 gedit/gedit-app.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gedit/gedit-app.c b/gedit/gedit-app.c
index de947f8..4e186aa 100644
--- a/gedit/gedit-app.c
+++ b/gedit/gedit-app.c
@@ -255,7 +255,7 @@ gedit_app_show_help_impl (GeditApp    *app,
 
        link = GEDIT_APP_GET_CLASS (app)->help_link_id (app, name, link_id);
 
-       ret = gtk_show_uri (gtk_widget_get_screen (GTK_WIDGET (parent)),
+       ret = gtk_show_uri_on_window (GTK_WINDOW (parent),
                            link,
                            GDK_CURRENT_TIME,
                            &error);