As of commit 3553ca6d414764dc72c2415099bf2f87f1a93918 Kirigami based UIs no longer load theme icons such as "document-edit" when previewed with qmlscene.
This breaks code such as:

Kirigami.ApplicationWindow {
  globalDrawer: Kirigami.GlobalDrawer {
    actions: [
      Kirigami.Action {
        text: "Demonstrate the bug"
        iconName: "tools-report-bug"
      }
    ]
  }
}

Reverting to a90b442d06b3b64dd681c84dcc7aa8c61fa53a29 makes qmlscene work again.

Please, unbreak this now! (Or update documentation to explain how to preview with qmlscene again.)