Clone non-owned default core materials before editing

Clone default core materials so you get owned entries you can edit, optionally in bulk and with prices.

1. Default core materials in the admin library are non-owned and cannot be edited directly.

   ✓ ९ ऑक्टोबर, २०२६ रोजी प्रॉडक्टमध्ये तपासले

2. Cloning can be done in bulk across groups.

   ✓ १२ ऑक्टोबर, २०२६ रोजी प्रॉडक्टमध्ये तपासले

3. Prices can be cloned along with the material.

   ✓ १२ ऑक्टोबर, २०२६ रोजी प्रॉडक्टमध्ये तपासले

4. Only owned (cloned) entries become editable.

   ✓ ९ ऑक्टोबर, २०२६ रोजी प्रॉडक्टमध्ये तपासले