Adds license text
Update clerk code page to use PP renderer and data-url's
Remove some code duplications
Dynamically calculate barcode width for Clerk barcodes.

* Adds template support for repeating the codes.
Adds customizable counter commands and their printing support
Adds some help for counter commands
Add vendor item list view to checkout.
Rebuild checkout UI on mode change.
Group items in vendor item report by type.
Add summary rows to vendor item report.
Add vendor info to item report.