Streamline page language linking
When having a Site configuration in order to create a page link for a specific language now property
language has to used instead of previous
additionalParams=&L=1. Since it might not know in all cases whether the defined TypoScript is used inside or outside a valid Site configuration,
language now takes precedence (if defined) and overrides the legacy L-parameter.
Besides that, linking to localized pages was not possible and is resolved to it's language parent page with adjusting the
language setting at the same time.