Auto-generate barcode number/code

Similar to auto-generation of SKU numbers, I have received a feature request for auto-generation of barcode number/codes.  I envision this feature as being a part of either product creation with a button next to the barcode field, or as a part of the General Settings.

In General Settings, I envision there being the following options for the configuration of barcodes:

• Characters used for auto-generation part of code: only number, only letters, or a combination of letters and numbers
  
• Length of auto-generation part of code
• User defined prefix (as with other DEAR code)
  
• User defined suffix (as with other DEAR code)