`&src` and `&dst` glob filters don't work on connections where both endpoints are in the same sub-container

[thirstyice]

Basically the title. See example below.
v0.7.1 and D2 Playground
All layout engines

classes: {
  orange: {
    style.stroke: orange
  }
}
direction: right

container: {
  w -> x: {style.stroke: green}
  x -> y
  y -> z
  y.class: orange
}

a -> container.y
container.y -> another.b

# Filters on connection globs work as expected
(** -> **)[*]: {
  &style.stroke: green
  label: I'm green!
}

# src/dst filters on connection globs do not work when both endpoints are in the same sub-container
(** -> container.y)[*]: {
  label: I should be red!
}
(** -> **)[*]: {
  &dst.class: orange
  style.stroke: red
}

# src/dst filters do work when the endpoints are in different sub-containers though
(container.y -> **)[*]: {
  label: I should be magenta!
}
(** -> **)[*]: {
  &src.class: orange
  style.stroke: magenta
}