Fix type inferencing, syntax highlighting and code navigation for method call with map delegate

[eric-milles]

Consider the following:

class C {
  def getX() { 'C' }
  void test() {
    [x:'map'].with {
      print getX()
    }
  }
}

Method call "getX()" is resolved incorrectly to the map. Running new C().test() outputs "C".

[eric-milles]