[epiphany] Fix New tab widget does not always show a label

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 0edf244da95c28f0fda64a8d5849e0119c78d7fd
Author: Jan-Michael Brummer <jan brummer tabos org>
Date:   Fri Mar 29 07:05:06 2019 +0100

    Fix New tab widget does not always show a label
    
    Fixes: https://gitlab.gnome.org/GNOME/epiphany/issues/712

 src/ephy-tab-label.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/ephy-tab-label.c b/src/ephy-tab-label.c
index 0820f7bce..eff6b01d9 100644
--- a/src/ephy-tab-label.c
+++ b/src/ephy-tab-label.c
@@ -171,7 +171,7 @@ ephy_tab_label_class_init (EphyTabLabelClass *klass)
   obj_properties[PROP_LABEL_TEXT] = g_param_spec_string ("label-text",
                                                          "Label Text",
                                                          "The displayed text",
-                                                         "",
+                                                         _("New Tab"),
                                                          G_PARAM_READWRITE |
                                                          G_PARAM_CONSTRUCT);