Wishlist Not Clearing When items moved to cart

-- HikaShop version -- : 2.6.1
-- Joomla version -- : 3.4.8
-- PHP version -- : 5.4.45

I am not sure if this is standard behavior of not. When a user add items to his Wishlist then places a check next to each item and clicks "Add To Cart", the items do not clear out from his wishlist. They do transfer over to the cart but a copy of them remains in the wishlist. Is this standard? If so, can anything be changed to remove the items once added to the cart?

Thank you so much for that detailed help, I can't begin to thank you enough for that. I will look into the modification, I actually peered around it a bit after asking the question to see what was possible. In the long run, however, I think since the modification would be to a controller I will leave it in its normal state to preserve it ability to receive regular updates. We will probably just add a text string at the top of the page to alert the user of the expected behavior.
Have a nice day!

Hi Nicolas,
If we add custom field in product then cart is not clearing.i have added following On line 420 in
/components/com_hikashop/controllers/cart.php
$cartClass->update($product_in_cart->cart_product_id, 0,0,'item',true,false,$cart_id);
then cart is cleared in wishlist .

Hi Nicholas,
Thank you for revert back to me.Let me try to explain .when i create custom field for item the original product is is not created and it will treat product as new product id.
if i created item with name orderid and pass it to through the system this new product id is saved in cart_product and later go to order_product table.
Now i go to hikashop cart and click on move_to and move the product to wishlist's.
if i go to wishlist and then select product and click on add to cart it will add the product in cart but never remove the product from wish list.that mean customer have to remove manually.
so i added this code.

I ended up with following solution:

in components/com_hikashop/controllers/cart.php
you should find this cycle:

if($add) {
			$formData = hikaInput::get()->get('data', array(), 'array');
			foreach($products as $key => &$product) {

if ($destCart->cart_type == "cart" && $cart->cart_type == "wishlist") {
	$cartClass->update($product->cart_product_id, 0,0,'item',true,false,$cart->cart_id);
}