Added version to Language Management, improved framework performance by loading languages into PageState, include all supported cultures and allow Administrator to add any language to a site regardless of translation availability, fix translation upgrade issue

Oqtane.Client/UI/PageState.cs

@@ -8,6 +8,7 @@ namespace Oqtane.UI
     {
         public Alias Alias { get; set; }
         public Site Site { get; set; }
+        public List<Language> Languages { get; set; }
         public List<Page> Pages { get; set; }
         public Page Page { get; set; }
         public User User { get; set; }