Fix saving order of open databases

* Order of previously open databases are preserved when closing the application
* The active database on closing remains active after startup
* Nested open previous databases and remember key files under the remember previously open databases setting
* Fix #1675

src/gui/ApplicationSettingsWidget.h

@@ -55,7 +55,8 @@ private slots:
     void reject();
     void autoSaveToggled(bool checked);
     void systrayToggled(bool checked);
-    void enableToolbarSettings(bool checked);
+    void toolbarSettingsToggled(bool checked);
+    void rememberDatabasesToggled(bool checked);
 
 private:
     QWidget* const m_secWidget;