Overriding project/product stringList properties doesn't work correctly for stringList properties

Overriding stringList property from command line does not work as expected.

# Overriding project or product property
qbs project.foo:aa,bb,cc myproduct.bar:aa,bb,cc

I would expect project.foo or myproduct.bar stringList property to contain 3 elements ['aa', 'bb', 'cc'] but instead it contains single element ['aa,bb,cc'].