BE: Provide two options for barcode tokens on patron notices

The two options should be barcode as an image and barcode as just a number. Currently it's inconsistent.

• Important note: Currently for notices, in preview mode the user.barcode and item.barcode both render as a image, but in the actual notice they are both just a number (string of text).

Given a patron notice edit/create mode
When operator clicks on the "add token" option { } and the token options are displayed as a modal
Then display two options for user barcode as follows:

• user.barcode
• user.barcodeImage

And display two options for item barcode as

• item.barcode
• item.barcodeImage

Given a patron notice edit/create or view mode
When operator clicks on "preview"
Then display the user barcode tokens as follows:

• user.barcode as a number only
• user.barcodeImage as a number with a barcode as a single image

And display the item barcode tokens as

• item.barcode as a number only
• item.barcodeImage as a number with a barcode as a single image

Given a patron notice with reference to user or item barcodes
When sent as email
Then render the user barcodes as follows:

• user.barcode as a number only
• user.barcodeImage as a number with a barcode as a single image

And render the item barcode tokens as follows:

• item.barcode as a number only
• item.barcodeImage as a number with a barcode as a single image