hide unlisted subpages in subnav

closes T-907

src/examples/basic/index.ts

@@ -114,7 +114,35 @@ const empty_page = new Page({
   },
   routes: {
     child_action: new Action(async () => {
-      return 'Hello!'
+      await io.group([
+        io.display.link('Go to unlisted action', {
+          route: 'empty_page/unlisted_action',
+          theme: 'secondary',
+        }),
+        io.display.link('Go to unlisted page', {
+          route: 'empty_page/unlisted_page',
+          theme: 'secondary',
+        }),
+      ])
+    }),
+    unlisted_action: new Action({
+      unlisted: true,
+      handler: async () => {
+        return 'Hello!'
+      },
+    }),
+    unlisted_page: new Page({
+      name: 'Unlisted page',
+      unlisted: true,
+      handler: async () => {
+        return new Layout({
+          children: [
+            io.display.markdown(
+              'This page is unlisted, but you can still access it!'
+            ),
+          ],
+        })
+      },
     }),
     show_layout: new Action(async () => {
       ctx.redirect({ route: 'empty_page', params: { show_layout: 1 } })