Many customers use External Page Editor to work with SPA, so renderType from TemplateDefinition is not needed anymore. We want to remove renderType from SPA definition. The template validation should not show major problem on the Definition App. It should show info message only if users set a render type that is not registered.

We might need to have a fallback renderer that renders a message for users to be aware of a render type that they used, is not registered in case they try to access our rendering service.

e.g. http://localhost:8080/magnoliaAuthor/aPage.html