Hide broken "Apply on Save" feature

The feature has always been somewhat experimental, but got even more
broken over time. Let's hide it for the time being.

Change-Id: If46861831d7fb7ed8e9b77b79d1ebe583243ab48
Reviewed-by: Leena Miettinen <riitta-leena.miettinen@digia.com>
Reviewed-by: hjk <hjk121@nokiamail.com>