[gnote] Manually delete search widget, may not be added to container

[Aurimas Černius <aurimasc src gnome org>]

commit 7120fcde4ea517e0ad3f963d008fc33c8dfa85a5
Author: Aurimas Černius <aurisc4 gmail com>
Date:   Mon Jan 4 22:47:22 2021 +0200

    Manually delete search widget, may not be added to container

 src/recentchanges.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/src/recentchanges.cpp b/src/recentchanges.cpp
index 78421a91..b6cad1ed 100644
--- a/src/recentchanges.cpp
+++ b/src/recentchanges.cpp
@@ -71,7 +71,7 @@ namespace gnote {
     set_has_resize_grip(true);
     set_icon_name(IconManager::GNOTE);
 
-    m_search_notes_widget = manage(new SearchNotesWidget(g, m));
+    m_search_notes_widget = new SearchNotesWidget(g, m);
     m_search_notes_widget->signal_open_note
       .connect(sigc::mem_fun(*this, &NoteRecentChanges::on_open_note));
     m_search_notes_widget->signal_open_note_new_window
@@ -141,6 +141,7 @@ namespace gnote {
     if(!m_search_box && m_search_text) {
       delete m_search_text;
     }
+    delete m_search_notes_widget;
   }
 
   void NoteRecentChanges::make_header_bar()