If you click Find Ticket, select All Tickets from the drop down and hit Refresh (only needed the first time you use Find Ticket), you will see all of the Tickets for the current day, select a Ticket and click Print Bill. This method is fast.
For a 'Print Last Ticket Button', we would need to store the Last Ticket Number, then have a Print Job that would use that stored number to print the Ticket. We currently can not do this as we can not store the Ticket Number, and we can not print by Ticket Number.
This is something Emre may look at for V3, but the Find Ticket Button does work very well.
PS - Maybe a recall last Ticket Button may be more useful for more than just printing a Bill.