The "Reprint receipt" button was not showing if an ePOS printer was
selected.
When the pos_reprint module was installed, the "Reprint Receipt" button
was always present, even if the checkbox in pos_config was unchecked.
When the IP address of an Epson printer is wrong the error message was
displayed before the POS was loaded so the user would never see it.
We now wait that the UI is loaded before showing it.
Add possibility to print receipts on an ePOS compatible Epson receipt
printer located in the same local network than the browser running the
pos.
TaskID: 2033442