Apply natural sorting to XPage Layouts

When adding an XPage in the Experience Manager, the entries in the "Page layout" dropdown are not sorted. Expected behavior by a client is that the Page Layout names are sorted.

The XHR call of the form /_rp/<pageuuid>./item/<sitemapitem-uuid> returns the layouts in random order:

"states": {
  "channel": {
    "xPageLayouts": {
      "hst:xpages/guide-format": "Guide",
      "hst:xpages/complex-content-article": "Complex Article",
      "hst:xpages/standard-content-article": "Standard Article",
      "hst:xpages/brand-page": "Brand Page",
    }
  },

No sorting is applied in the back end, neither in org.hippoecm.hst.pagecomposer.jaxrs.services.ChannelServiceImpl#getXPageLayouts nor in org.hippoecm.hst.pagecomposer.jaxrs.services.component.HstStateProvider#getStates

    states.put(HstState.CHANNEL_XPAGE_LAYOUTS, channelContext.getXPageLayouts().stream()
                .collect(toMap(XPageLayout::getKey, XPageLayout::getLabel)));