Export of goods to Bitrix - how to display the values ​​of the MORE_PHOTO property in one cell separated by commas?

Question

Bitrix24

I have an online store. On the product page, I want to display multiple images using MORE_PHOTO . But at the same time, so that when exporting and importing goods in EXCEL , several lines are not created for each product .

I solved the problem with importing goods to the site as follows:
Before this line in the php file /bitrix/modules/catalog/load_import/csv_new_run.php:

elseif ($arIBlockProperty[$cur_prop_id]["PROPERTY_TYPE"]=="F")

I pasted the following:

elseif ($arIBlockProperty[$cur_prop_id]["PROPERTY_TYPE"]=="F" && $arIBlockProperty[$cur_prop_id]["MULTIPLE"]=="Y")
                            {
                                $files = explode(',', $arRes[$i]);

                                $arFileFields = [];

                                foreach ($files as $file)
                                {
                                    $file = trim($file);

                                    if(preg_match("/^(ftp|ftps|http|https):\\/\\//", $file))
                                        $file = CFile::MakeFileArray($file);
                                    else
                                        $file = CFile::MakeFileArray($io->GetPhysicalName($_SERVER["DOCUMENT_ROOT"].$PATH2IMAGE_FILES.'/'.$file));

                                    $arFileFields[] =  ['VALUE' => $file, 'DESCRIPTION' => ''];
                                }

                                $PROP[$cur_prop_id] = $arFileFields;
                                continue;
                            }

Now, when importing products in a CSV file, I can insert links to images separated by commas in the MORE_PHOTO cell. But when exporting this table, for each product, a separate row is created for each value of this cell:



How can I configure the export so that these values ​​are in one cell, separated by commas?