Add editFinished signal which can be used to auto save the database.

src/gui/DatabaseTabWidget.h

@@ -82,6 +82,7 @@ Q_SIGNALS:
     void tabNameChanged();
 
 private Q_SLOTS:
+    void autoSave();
     void updateTabName(Database* db);
     void updateTabNameFromSender();
     void openDatabaseDialog(const QString& pw = QString(), const QString& keyFile = QString());