Bugfix in Update iamge handling

CoviDok/Data/MySQL/MySqlCaseHandler.cs

@@ -94,6 +94,7 @@ namespace CoviDok.Data.MySQL
             string[] forbidden = { "Updates" };
             PropertyCopier<Case>.Copy(Case, c, forbidden);
             context.Updates.Add(update);
+            await context.SaveChangesAsync();
             foreach (string ImageId in update.Images)
             {
                 Image image = new Image