- Don't use this if we don't need it (QObject::tr is static).
- C++14 allows (copy) binding to arbitrary expresstions in lambda's,
so detach from this.
- The NAM is being created from a method call on the GeneralRequirements
object in the requirements-checking thread, while the GR object itself
was created in a different thread. This cross-thread parenting
produces a warning, and we don't need the parent relationship here
anyway.
