[gtranslator] Restore Ctrl+Q quit shortcut

[Andre Klapper <aklapper src gnome org>]

commit bf93189f91c619e7f4140a8ca55a4cbdc0a1482c
Author: Andre Klapper <a9016009 gmx de>
Date:   Wed Sep 18 19:47:01 2019 +0200

    Restore Ctrl+Q quit shortcut
    
    Fixes #82

 src/gtr-application.c | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/src/gtr-application.c b/src/gtr-application.c
index ff4c0714..a339cb69 100644
--- a/src/gtr-application.c
+++ b/src/gtr-application.c
@@ -579,6 +579,7 @@ gtr_application_startup (GApplication *application)
   set_kb (application, "app.save", "<Ctrl>s");
   set_kb (application, "app.saveas", "<Ctrl><Shift>s");
   set_kb (application, "app.preferences", "<Ctrl>p");
+  set_kb (application, "app.quit", "<Primary>q");
 
   set_kb (application, "app.undo", "<Ctrl>z");
   set_kb (application, "app.redo", "<Ctrl><Shift>z");