renamed control to action to reflect its purpose and be more consistent with asp.net conventions

Oqtane.Client/Shared/PageState.cs

@@ -18,7 +18,7 @@ namespace Oqtane.Shared
         public Uri Uri { get; set; }
         public Dictionary<string, string> QueryString { get; set; }
         public int ModuleId { get; set; }
-        public string Control { get; set; }
+        public string Action { get; set; }
         public bool EditMode { get; set; }
         public bool DesignMode { get; set; }
     }