[FIX] web_kanban: odd/even column color when sorting
[FIX] web_kanban: odd/even column color when sorting

The kanban columns color switched when a column was being dragged.

microcom/odoo,sysadminmatmoz/OCB,optima-ict/odoo,sysadminmatmoz/OCB,microcom/odoo,sysadminmatmoz/OCB,ygol/odoo,Elico-Corp/odoo_OCB,storm-computers/odoo,ygol/odoo,Elico-Corp/odoo_OCB,stephen144/odoo,stephen144/odoo,bplancher/odoo,Elico-Corp/odoo_OCB,microcom/odoo,storm-computers/odoo,ygol/odoo,syci/OCB,syci/OCB,dfang/odoo,ygol/odoo,Elico-Corp/odoo_OCB,dfang/odoo,bplancher/odoo,ygol/odoo,optima-ict/odoo,laslabs/odoo,microcom/odoo,syci/OCB,stephen144/odoo,Elico-Corp/odoo_OCB,storm-computers/odoo,dfang/odoo,storm-computers/odoo,microcom/odoo,Elico-Corp/odoo_OCB,syci/OCB,stephen144/odoo,hip-odoo/odoo,dfang/odoo,hip-odoo/odoo,hip-odoo/odoo,sysadminmatmoz/OCB,optima-ict/odoo,hip-odoo/odoo,bplancher/odoo,microcom/odoo,dfang/odoo,sysadminmatmoz/OCB,bplancher/odoo,sysadminmatmoz/OCB,laslabs/odoo,ygol/odoo,hip-odoo/odoo,bplancher/odoo,stephen144/odoo,storm-computers/odoo,ygol/odoo,laslabs/odoo,optima-ict/odoo,hip-odoo/odoo,sysadminmatmoz/OCB,stephen144/odoo,laslabs/odoo,bplancher/odoo,laslabs/odoo,optima-ict/odoo,dfang/odoo,laslabs/odoo,syci/OCB,storm-computers/odoo,syci/OCB,optima-ict/odoo