Image added (#434)

* Image added

* ImageMaximumBytes

* FileController remove Authorized

* ApplicationCore.Constants.AuthorizationConstants.AUTH_KEY

* SavePicture in the interface.

* IFileSystem in Core

* WebFileSystem in Infrastructure

* PictureUri removed from UpdateCatalogItemRequest

* Modal scroll fix

src/PublicApi/CatalogItemEndpoints/Create.CreateCatalogItemRequest.cs

@@ -7,6 +7,8 @@
         public string Description { get; set; }
         public string Name { get; set; }
         public string PictureUri { get; set; }
+        public string PictureBase64 { get; set; }
+        public string PictureName { get; set; }
         public decimal Price { get; set; }
     }