The option is used for the stop button in the application output.
Closing tabs will still ask unconditionally, also if applications would
be killed as a side-effect, e.g. of closing Qt Creator.
The Symbian controls also always ask, with a more descriptive text,
because killing applications might have negative effect on the device in
some cases.
Reviewed-by: Friedemann Kleint
Task-number: QTCREATORBUG-3119
