message: Monitoring: Wrap PromQL <pre> to fix page layout in Firefox
  The query <pre> was not wrapping in Firefox, which forced the page width
  out. A solution is to allow the query text to wrap, which is perhaps
  better anyway since it then shows the full query.
diff: @@ -353,7 +353,7 @@ const AlertRulesDetailsPage = withFallback(connect(ruleStateToProps)((props: Ale
  <dd>{formatDuration(duration * 1000)}</dd>
  </React.Fragment>}
  <dt>Expression</dt>
  - <dd><pre className="monitoring-query">{query}</pre></dd>
  + <dd><pre className="co-pre-wrap monitoring-query">{query}</pre></dd>
  </dl>
  </div>
  </div>
  