Item Kits updates for form and Barcodes to show (#3949)

* Update Item_kits.php

* Update Item_kits.php Barcode Issue

public function Generate Barcodes
changed Code to just c and it started working
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Internal Server Error - Gitea: Git with a cup of tea
500 Internal Server Error

Gitea Version: 1.28.0+dev-477-g8b6ad49a5f