Fix open declaration for trait field and static method references in trait implementer

[eric-milles]

Consider the following:

trait T {
  private def field
  private static def staticField
  private static final def STATIC_VALUE = null
  private static def staticMethod() {
  }
}
class C implements T {
  def m() {
    T__field
    T__staticField
    T__STATIC_VALUE
    staticMethod()
  }
}

Open Declaration (F3 or Ctrl+click) on any of the expressions in C.m() navigate to the top of the source file containing the trait. By contrast, T.super.staticMethod() and public method calls support navigation.