[epiphany] Don't open new tabs in application mode

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 02d57b0688d30af1faa65481378db8347aae470c
Author: Flavio Gallistl <flavio gallistl stud uni-hannover de>
Date:   Thu Apr 20 23:03:37 2017 +0200

    Don't open new tabs in application mode
    
    https://bugzilla.gnome.org/show_bug.cgi?id=781440

 src/ephy-window.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/src/ephy-window.c b/src/ephy-window.c
index 1bedad3..5da1d63 100644
--- a/src/ephy-window.c
+++ b/src/ephy-window.c
@@ -2971,7 +2971,8 @@ static const char *disabled_actions_for_app_mode[] = { "open",
                                                        "encoding",
                                                        "bookmark-page",
                                                        "page-source",
-                                                       "toggle-inspector" };
+                                                       "toggle-inspector",
+                                                       "new-tab" };
 
 static void
 parse_css_error (GtkCssProvider *provider,