Fix quickinfo display of deferred mapped types
Fix quickinfo display of deferred mapped types

basarat/TypeScript,minestarks/TypeScript,SaschaNaz/TypeScript,donaldpipowitch/TypeScript,microsoft/TypeScript,kitsonk/TypeScript,RyanCavanaugh/TypeScript,basarat/TypeScript,nojvek/TypeScript,RyanCavanaugh/TypeScript,donaldpipowitch/TypeScript,kitsonk/TypeScript,alexeagle/TypeScript,nojvek/TypeScript,SaschaNaz/TypeScript,weswigham/TypeScript,SaschaNaz/TypeScript,Microsoft/TypeScript,RyanCavanaugh/TypeScript,weswigham/TypeScript,donaldpipowitch/TypeScript,kitsonk/TypeScript,microsoft/TypeScript,alexeagle/TypeScript,minestarks/TypeScript,kpreisser/TypeScript,alexeagle/TypeScript,nojvek/TypeScript,SaschaNaz/TypeScript,Microsoft/TypeScript,donaldpipowitch/TypeScript,minestarks/TypeScript,basarat/TypeScript,kpreisser/TypeScript,weswigham/TypeScript,microsoft/TypeScript,nojvek/TypeScript,kpreisser/TypeScript,Microsoft/TypeScript,basarat/TypeScript