Allow for saving the configuration used by a window opened from a URL.

Note when editing a copy save password works now too.

pglab/DatabaseWindow.h

@@ -105,6 +105,7 @@ private slots:
     void on_actionSave_query_as_triggered();
     void on_actionSave_copy_of_query_as_triggered();
     void on_actionShow_connection_manager_triggered();
+    void on_actionSave_connection_triggered();
 
     void on_actionManual_triggered();