Propose private trait fields and methods within trait and implementers

[eric-milles]

Consider the following:

trait T {
  public def f1
  private def f2
  public static def f3
  private static def f4
  def m1() {
    // Ctrl+Space should propose f1, f2, f3, f4, m1, m2, m3, m4
  }
  private def m2() {
    // Ctrl+Space should propose f1, f2, f3, f4, m1, m2, m3, m4
  }
  public static def m3() {
    // Ctrl+Space should propose f3, f4, m3, m4
  }
  private static def m4() {
    // Ctrl+Space should propose f3, f4, m3, m4
  }
}

class C implements T {
  def m() {
    // Ctrl+Space should propose T__f1, T__f2, T__f3, T__f4, m1, m2?, m3, m4
  }
  static def sm() {
    // Ctrl+Space should propose T__f3, T__f4, m3, m4
  }
}