[gnome-taquin] Add F1 shortcut for opening help.

[Arnaud B. <arnaudb src gnome org>]

commit 699ad86b0758be0c329592a8464906539e3d9338
Author: Arnaud Bonatti <arnaud bonatti gmail com>
Date:   Mon Jan 7 17:08:02 2019 +0100

    Add F1 shortcut for opening help.

 src/taquin-main.vala | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/src/taquin-main.vala b/src/taquin-main.vala
index a022493..0fb7dbd 100644
--- a/src/taquin-main.vala
+++ b/src/taquin-main.vala
@@ -148,6 +148,7 @@ public class Taquin : Gtk.Application
         set_accels_for_action ("win.redo",              { "<Shift><Primary>z"       });
         set_accels_for_action ("win.back",              {                 "Escape"  });
         set_accels_for_action ("win.toggle-hamburger",  {                 "F10"     });
+        set_accels_for_action ("app.help",              {                 "F1"      });
 
         /* New-game screen signals */
         size_button = (MenuButton) builder.get_object ("size-button");