[epiphany] Use back and forward buttons in conjunction with Ctrl key

[Michael Catanzaro <mcatanzaro src gnome org>]

commit ff0aa0e6ceff78dd7667a02af839d03dd6757edc
Author: Jan-Michael Brummer <jan brummer tabos org>
Date:   Thu Apr 18 21:12:37 2019 +0200

    Use back and forward buttons in conjunction with Ctrl key
    
    Fixes: https://gitlab.gnome.org/GNOME/epiphany/issues/727

 src/window-commands.c | 6 ++++++
 1 file changed, 6 insertions(+)
---
diff --git a/src/window-commands.c b/src/window-commands.c
index 95bda9585..6f492c189 100644
--- a/src/window-commands.c
+++ b/src/window-commands.c
@@ -660,6 +660,12 @@ window_cmd_navigation (GSimpleAction *action,
   EphyWindow *window = EPHY_WINDOW (user_data);
   EphyEmbed *embed;
   WebKitWebView *web_view;
+  EphyLinkFlags flags = ephy_link_flags_from_current_event ();
+
+  if (flags & EPHY_LINK_NEW_TAB) {
+    window_cmd_navigation_new_tab (action, parameter, user_data);
+    return;
+  }
 
   embed = ephy_embed_container_get_active_child (EPHY_EMBED_CONTAINER (window));
   g_assert (embed != NULL);