[IMP] stock: rehabilited the constraint check on traceability of lots. Improved it by allowing to track all operations (included the internal -> internal ones). Refactored in order to move the track_production field in mrp, where it's meaningful. Removed also a unused/deprecated wizard to change qty on a move
[REV] stock: added back the wizard to change the quantity removed in previous commit: it's not deprecated at all as it applies on product, not stock moves\!
[FIX] stock: adapted the change qty wizard to the move of track_production in MRP module (fields_view_get overridding removed, the field may not be required as it will raise an error if needed)