fix(dashboard): remove status list if there are none

- resolves https://github.com/nextcloud/server/issues/59334

If there are no status entries the list must be removed.
Its not valid to show an empty list as per accessibility rules:
https://www.w3.org/TR/wai-aria-1.2/#mustContain

Signed-off-by: Ferdinand Thiessen <opensource@fthiessen.de>

apps/dashboard/src/DashboardApp.vue

@@ -5,7 +5,7 @@
 <template>
 	<main id="app-dashboard">
 		<h2>{{ greeting.text }}</h2>
-		<ul class="statuses">
+		<ul v-if="sortedRegisteredStatus.length > 0" class="statuses">
 			<li
 				v-for="status in sortedRegisteredStatus"
 				:id="'status-' + status"