- Commit 458c2fa297 provoked the error,
because the "core" "app" was not found. Previously, false was
returned, but now an AppPathNotFoundException
- IUrlGenerator::linkTo() accepts an empty app argument however, moving
the "core" portion to the path solves it and avoids apps lookup
Signed-off-by: Arthur Schiwon <blizzz@arthur-schiwon.de>