[gtkmm] Popover: Add get/set_default_widget().

[Murray Cumming <murrayc src gnome org>]

commit 426ee921993a2dacd65e2730f05f6182739908b2
Author: Murray Cumming <murrayc murrayc com>
Date:   Thu Jul 16 08:44:27 2015 +0200

    Popover: Add get/set_default_widget().

 gtk/src/popover.hg |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)
---
diff --git a/gtk/src/popover.hg b/gtk/src/popover.hg
index b41128c..5e7aa1d 100644
--- a/gtk/src/popover.hg
+++ b/gtk/src/popover.hg
@@ -122,6 +122,11 @@ public:
   _WRAP_METHOD(void set_transitions_enabled(bool transitions_enabled = true), 
gtk_popover_set_transitions_enabled)
   _WRAP_METHOD(bool get_transitions_enabled() const, gtk_popover_get_transitions_enabled)
 
+  _WRAP_METHOD(void set_default_widget(Widget& widget), gtk_popover_set_default_widget)
+
+  _WRAP_METHOD(Widget* get_default_widget(), gtk_popover_get_default_widget)
+  _WRAP_METHOD(const Widget* get_default_widget() const, gtk_popover_get_default_widget, constversion)
+
   //Ignore private methods.
   _IGNORE(gtk_popover_update_position)