[IMP] stock, barcodes: make barcode operations more mobile friendly

We want to properly support devices like the Symbol MC3200. This is a
handheld computer running a modern operating system like Android or
Windows with an integrated barcode scanner. After installation of a
modern web browser and configuration of the integrated barcode scanner
Odoo works as well as it does anywhere else.

The main issue with these types of devices is that the displays (and
their resolution) are very small (3" @ 320x320 for Symbol
MC3200). Because of this a lot of tree views become awkward to use
because they require vertical scrolling. A Kanban view however scales
nicely on these displays.

This implements Kanban views for both the picking.form view and the
stock.inventory form view because those are the views typically used
when using a barcode scanner.

Doing this alone is not enough, because the barcodes module does not
work with Kanban views. Small changes where made to
barcodes.FormViewBarcodeHandler to make it work with both List views and
Kanban views.