[gnome-tweaks] Adjust Gtk.Application app-id to match other uses

[Jeremy Bicha <jbicha src gnome org>]

commit 6430bc28f339d07e20a17212190f579efc9db305
Author: Bilal Elmoussaoui <bil elmoussaoui gmail com>
Date:   Wed Dec 5 19:07:05 2018 +0000

    Adjust Gtk.Application app-id to match other uses
    
    Use the lower-case org.gnome.tweaks name to match the .desktop,
    app icon, and AppStream metadata filenames.

 gtweak/app.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/gtweak/app.py b/gtweak/app.py
index aa15c3a..caabdb2 100644
--- a/gtweak/app.py
+++ b/gtweak/app.py
@@ -21,7 +21,7 @@ class GnomeTweaks(Gtk.Application):
 
     def __init__(self):
         GLib.set_application_name(_("GNOME Tweaks"))
-        Gtk.Application.__init__(self, application_id="org.gnome.Tweaks")
+        Gtk.Application.__init__(self, application_id="org.gnome.tweaks")
         self.win = None
 
     def do_activate(self):