Feature request: keep typedefs during type flow analysis

For typedefs `typedef MyType as [Number, Float];` and code like this: `function f(myType as MyType) as Void { var x = myType; }` it would be nice, if PMC showed type of `x` as `MyType` or `MyType ([Number, Float])` instead of just `[Number, Float]`.

Although the current implementation is fully correct, the proposed improvement could simplify manual code analysis.