message: Add PressTipHeader to material counts tooltip.
diff: +import { PressTipHeader } from 'app/dim-ui/PressTip';
  import { t } from 'app/i18next-t';
  import { Observable } from 'app/utils/observable';
  import { useSubscription } from 'use-subscription';
  @@ -39,8 +40,7 @@ export function MaterialCountsSheet() {
  export function MaterialCountsTooltip() {
  return (
  <>
  - {t('Header.MaterialCounts')}
  - <hr />
  + <PressTipHeader header={t('Header.MaterialCounts')} />
  <MaterialCounts wide />
  </>
  );
  