[gnote] Fix crash when multiple windows are used and notes are moved between them

[Aurimas Černius <aurimasc src gnome org>]

commit fe119fb2b456ff686ead9a71d0c43a787ad511d0
Author: Aurimas Černius <aurisc4 gmail com>
Date:   Thu May 20 22:45:21 2021 +0300

    Fix crash when multiple windows are used and notes are moved between them

 src/recentchanges.cpp | 5 +++++
 1 file changed, 5 insertions(+)
---
diff --git a/src/recentchanges.cpp b/src/recentchanges.cpp
index a2dd2aaa..2af6ddd5 100644
--- a/src/recentchanges.cpp
+++ b/src/recentchanges.cpp
@@ -450,6 +450,11 @@ namespace gnote {
         background_embedded(*widget);
       }
     }
+    for(auto embedded : m_embedded_widgets) {
+      if(embedded != m_search_notes_widget) {
+        embedded->unembed();
+      }
+    }
 
     hide();
   }