In the screen for the vertical lift shuttles, accessible through
Inventory > Operations > Vertical Lift Shuttles, a new button has been
added to allow to skip an operation. This button can also be triggered
by scanning the barcode O-BTN.skip.svg that is inside the folder
'images'.
When a skip is done, the next stock.move.line to pick is chosen and
shown to the operator. A skipped move line is added to the end of the
list of pending move lines to be picked, so they will be shown again
in the future as soon as the other move lines have been successfully
processed.
This option was added because, sometimes, the operator can not process
a move line for whatever reason. Right now, the only way of proceeding
is to wait until he/she can effectively process it, which involves a
delay in the operations. With this new skip operation, the operator
can continue processing the rest of move lines.
The check was means as an optimization: no need to fetch at tray already
open. But "fetch_tray" will not only open the tray, it may also move the
laser on the exact position. So we should do it for every inventory line.
