Fix Delete from product_batch on product delete

Fixed issue in list skeleton with extrafields join for search. Main table alias is t not u. 

Fix missing language key

FIX #5325 contract service triggers

Scrutinizer Auto-Fixes

This commit consists of patches automatically generated for this project on https://scrutinizer-ci.com

u.

Intention is to remove all data linked to product_stock, which will be
deleted.

Pass ContratLigne objects to the triggers when updating contract
lines

if supplier have multiple price return it several times

Fix #5994 unable to update warehouse

FIX : wrong var name

from declaration array.

missing import_key field, ref generator parameter must be task not
project, import must use css, serious database integrity problem
accepting duplicate tasks.