[gnote] Make search popover change when plugins request

[Aurimas Černius <aurimasc src gnome org>]

commit 7ba02d85d6f48a4145464de7f8c11dbe1a219c05
Author: Aurimas Černius <aurisc4 gmail com>
Date:   Sun Mar 24 22:15:35 2019 +0200

    Make search popover change when plugins request

 src/searchnoteswidget.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)
---
diff --git a/src/searchnoteswidget.cpp b/src/searchnoteswidget.cpp
index f58dc164..bf00931b 100644
--- a/src/searchnoteswidget.cpp
+++ b/src/searchnoteswidget.cpp
@@ -1,7 +1,7 @@
 /*
  * gnote
  *
- * Copyright (C) 2010-2015,2017 Aurimas Cernius
+ * Copyright (C) 2010-2015,2017,2019 Aurimas Cernius
  * Copyright (C) 2010 Debarshi Ray
  * Copyright (C) 2009 Hubert Figuiere
  *
@@ -1399,6 +1399,8 @@ void SearchNotesWidget::foreground()
   register_callbacks();
   m_callback_changed_cid = manager.signal_main_window_search_actions_changed
     .connect(sigc::mem_fun(*this, &SearchNotesWidget::callbacks_changed));
+  manager.signal_main_window_search_actions_changed
+    .connect([this]{ signal_popover_widgets_changed(); });
 }
 
 void SearchNotesWidget::background()