Add API for converting a container in a QVariant into a QVariantList.
Add API for converting a container in a QVariant into a QVariantList.

cutelyst/grantlee,cutelyst/grantlee,simonwagner/grantlee,cutelyst/grantlee,simonwagner/grantlee,simonwagner/grantlee,cutelyst/grantlee,cutelyst/grantlee,simonwagner/grantlee,simonwagner/grantlee,simonwagner/grantlee