// pairs: (HTML text, false=left/true=right)
sS htmlForJLabel_chatConvo(LPair<S, Bool> dialog, int width) {
  ret hhtml(div(lines(mapPairsToList(dialog, (content, right) -> {
    S color = right ? "#9999FF" : "#99FF99";
    ret div(span(content, style := "background: \*color*/"),
      style := "margin-bottom: 5px; margin-" + (right ? "right" : "left") + ": 20px; padding: 2px");
  })), +width));
}