Delete serials

This action requires the "delete serial" permission.

Serials should, in most cases, not be deleted. The only exceptions are duplicates of existing serials. This happens when serials are create through different sources without all information.

 When this happens, both serials should be checked and their data synced (warranty, calibration intervals, file manager contents...)

After syncing all serial data, the serial with existing stock transactions should be retained,  while the duplicate can be deleted.