message: make plugset collapse handle match
diff: @@ -55,7 +55,10 @@ export default class PlugSet extends React.Component<Props> {
  className="collapse-handle"
  onClick={() => onNodePathSelected(childrenExpanded ? [] : [plugSetHash])}
  >
  - <AppIcon className="collapse" icon={childrenExpanded ? collapseIcon : expandIcon} />{' '}
  + <AppIcon
  + className="collapse-icon"
  + icon={childrenExpanded ? collapseIcon : expandIcon}
  + />{' '}
  {title}
  </span>
  <div className="node-progress">
  