feat: add on mounted hook for bookmarklets (#1120)

* add utility type to hide Advanced items

* add default text

* fix #1115 and minor refactorings

* generate types

* hotfix: add validator to catch null vlaues

frontend/components/global/AdvancedOnly.vue

@@ -0,0 +1,23 @@
+<template>
+  <div scoped-slot></div>
+</template>
+
+<script lang="ts">
+import { defineComponent, useContext } from "@nuxtjs/composition-api";
+
+/**
+ * Renderless component that only renders if the user is logged in.
+ * and has advanced options toggled.
+ */
+export default defineComponent({
+  setup(_, ctx) {
+    const { $auth } = useContext();
+
+    const r = $auth?.user?.advanced || false;
+
+    return () => {
+      return r ? ctx.slots.default?.() : null;
+    };
+  },
+});
+</script>