Generics within Generics not Represented On Diagrams

[gboersma]

Generics embedded within generic parameters are not represented well across all diagrams:

• Fields show only the first level of generics, e.g. List<Optional<String>> shows up as List<Optional>.
• A relationship with an embedded generic is not shown on the diagram, e.g. List<Optional<MyClass>> will not show a uses relationship with MyClass.
• Specifying wildcards as generic parameters can be problematic when generating diagrams: can show as a separate package on a package diagram.

[gboersma]

Fix to display the generics correctly for parameterized types for class names, attributes, and methods. However, still not displaying type variables correctly.