Because the project storage is integer id based the string based API
isn't fitting well for the new approach. PropertyMetaInfo can be easier
mapped to the project storage.
Task-number: QDS-7197
Change-Id: I49bc650abdaacf4b039d76c2514b5ad05ec84abe
Reviewed-by: Thomas Hartmann <thomas.hartmann@qt.io>
And PropertyName is a typedef for QByteArray. Because we don't use the
features of QString and the source would be cluttered with QLatin1Strings
we changed the property name to QByteArray.
Change-Id: Ib70ef136bbc411504b450456bd9bb705ae93dd25
Reviewed-by: Thomas Hartmann <Thomas.Hartmann@digia.com>
