[gitg] Shorcut to open preferences

[Alberto Fanjul <albfan src gnome org>]

commit c8aa035e1e5f60adf81384914d4f278a0000edf2
Author: Alberto Fanjul <albertofanjul gmail com>
Date:   Sat Dec 29 12:51:07 2018 +0100

    Shorcut to open preferences
    
    <Primary>comma will open preferences dialog in any view
    <Escape> will close it as usual

 gitg/gitg-application.vala | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/gitg/gitg-application.vala b/gitg/gitg-application.vala
index 0aae0732..81829543 100644
--- a/gitg/gitg-application.vala
+++ b/gitg/gitg-application.vala
@@ -394,7 +394,8 @@ public class Application : Gtk.Application
                        {"win.search", "<Primary>F"},
                        {"win.gear-menu", "F10"},
                        {"win.open-repository", "<Primary>O"},
-                       {"win.close", "<Primary>W"}
+                       {"win.close", "<Primary>W"},
+                       {"win.preferences", "<Primary>comma"},
                };
 
                var multi_accels = new MultiAccel[] {