[6.x] Global site selector should only be visible when you have > 1 site (#12655)

Author: duncanmcclean

resources/js/components/global-header/SiteSelector.vue

@@ -1,5 +1,5 @@
 <template>
-    <div class="flex h-full items-center animate-in fade-in duration-750 fill-mode-forwards" data-ui-global-site-selector>
+    <div v-if="sites.length > 1" class="flex h-full items-center animate-in fade-in duration-750 fill-mode-forwards" data-ui-global-site-selector>
         <Select
             :model-value="active"
             :options="sites"