[gnome-taquin] Add Shift-F1 shortcut for about dialog.

[Arnaud B. <arnaudb src gnome org>]

commit 8346f94f3a11e16f3047aae06534d9f56af88d56
Author: Arnaud Bonatti <arnaud bonatti gmail com>
Date:   Mon Jan 7 17:13:23 2019 +0100

    Add Shift-F1 shortcut for about dialog.

 src/taquin-main.vala | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/src/taquin-main.vala b/src/taquin-main.vala
index 0fb7dbd..03b9e3a 100644
--- a/src/taquin-main.vala
+++ b/src/taquin-main.vala
@@ -149,6 +149,7 @@ public class Taquin : Gtk.Application
         set_accels_for_action ("win.back",              {                 "Escape"  });
         set_accels_for_action ("win.toggle-hamburger",  {                 "F10"     });
         set_accels_for_action ("app.help",              {                 "F1"      });
+        set_accels_for_action ("app.about",             {          "<Shift>F1"      });
 
         /* New-game screen signals */
         size_button = (MenuButton) builder.get_object ("size-button");