Empty service status value on incident creation/update

[edigiacomo]

On incident creation or update, the "service status" selection is mandatory and it updates the status of the involved services. It should be possibile to not update the status of the services.

[edigiacomo]

@brancomat, it's ok if this becomes the default behavior? Or would you prefer that it is enabled with a settings variable?

[edigiacomo]

After a quick chat with @brancomat: it must be possibile to update or leave unaltered the status of the involved services. The latter will be implemented as an <option> with an empty value in the service status <select>. The empty value will be the default one of the selection.

[edigiacomo]

This is a screenshot of the new interface.