Resolve issues with typename that prevent proper representation of typedef'd function signatures.

[Ed94]

// Currently:
<ModuleFlags> typedef <UnderlyingType (Serialized expression)>; <InlineCmt>

// Desired: Not handled yet
<ModuleFlags> typedef <UnderlyingType->ReturnType> UnderlyingType->Name> <UnderlyingType-ArrExpr> ( <UnderlyingType->Parameters> ); <InlineCmt>
<ModuleFlags> typedef <UnderlyingType->ReturnType> ( <Name->Namespace> for<Specs->has_or(Spec_Ptr, Spec_Ref) ?: *> <UnderlyingType->Name> <UnderlyingType-ArrExpr> ) ( <UnderlyingType->Parameters> ); <InlineCmt>

For this we'll need proper support of namespaces or name context chaining.

This is the worst aspect of the current behavior done with parsing.