[evolution] Make ECompEditor an extensible

[Milan Crha <mcrha src gnome org>]

commit b56f2668697227ad3c043da116151b458c6f360f
Author: Milan Crha <mcrha redhat com>
Date:   Mon Aug 22 12:23:07 2016 +0200

    Make ECompEditor an extensible
    
    Thus it can be extended by 3rd-party modules.

 calendar/gui/e-comp-editor.c |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)
---
diff --git a/calendar/gui/e-comp-editor.c b/calendar/gui/e-comp-editor.c
index d168389..c33f9e6 100644
--- a/calendar/gui/e-comp-editor.c
+++ b/calendar/gui/e-comp-editor.c
@@ -105,7 +105,8 @@ static GSList *opened_editors = NULL;
 static void e_comp_editor_alert_sink_iface_init (EAlertSinkInterface *iface);
 
 G_DEFINE_ABSTRACT_TYPE_WITH_CODE (ECompEditor, e_comp_editor, GTK_TYPE_WINDOW,
-       G_IMPLEMENT_INTERFACE (E_TYPE_ALERT_SINK, e_comp_editor_alert_sink_iface_init))
+       G_IMPLEMENT_INTERFACE (E_TYPE_ALERT_SINK, e_comp_editor_alert_sink_iface_init)
+       G_IMPLEMENT_INTERFACE (E_TYPE_EXTENSIBLE, NULL))
 
 static void
 ece_restore_focus (ECompEditor *comp_editor)
@@ -2299,6 +2300,8 @@ e_comp_editor_constructed (GObject *object)
        g_signal_connect (comp_editor, "unrealize", G_CALLBACK (comp_editor_unrealize_cb), NULL);
 
        gtk_application_add_window (GTK_APPLICATION (comp_editor->priv->shell), GTK_WINDOW (comp_editor));
+
+       e_extensible_load_extensions (E_EXTENSIBLE (comp_editor));
 }
 
 static void