Option to persist sparql query on each change

[svilenvelikov]

It might be good option to allow the sparql query which the user just typed in the editor to be persisted in the storage on each change (keystroke) and not only on blur or tab change which seems to be the case currently. This might help to prevent losing the query which user entered in case of tab refresh / close.
Or if there is a way to do it within the current yasgui, it can be described in the documentation perhaps.