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.Shared/Models/Language.cs

@@ -1,4 +1,5 @@
 using System;
+using System.ComponentModel.DataAnnotations.Schema;
 
 namespace Oqtane.Models
 {
@@ -34,6 +35,12 @@ namespace Oqtane.Models
         /// </summary>
         public bool IsDefault { get; set; }
 
+        [NotMapped]
+        /// <summary>
+        /// Version of the satellite assembly
+        /// </summary>
+        public string Version { get; set; }
+
         #region IAuditable Properties
 
         /// <inheritdoc/>