dart editor shows static members in code completion after instance variable

[DartBot]

This issue was originally filed by mattsh@google.com

---

For example:

class Zebra {
  static int x;
  Zebra() {}
}

void main() {
  Zebra z = new Zebra();
  z. // here code completion shows the static member 'x' even though it cannot be accessed through the instance variable
}

[danrubel]

Set owner to @stevemessick.

[stevemessick]

Added Started label.

[stevemessick]

Added Fixed label.