message: use underscore for italics so it doesn't collide with bold when toggling
diff: @@ -460,7 +460,7 @@ export default class BasicMessageEditor extends React.Component {
  toggleInlineFormat(range, "**");
  break;
  case "italics":
  - toggleInlineFormat(range, "*");
  + toggleInlineFormat(range, "_");
  break;
  case "strikethrough":
  toggleInlineFormat(range, "<del>", "</del>");
  