[IMP] pos: better default start date 1;2802;0c now() was bad as it excluded the orders of the latest session midnight is not good either because - midnight server != midnight user (timezone) - some restaurant, bars start in the evening and finish after midgnight
[IMP] pos: better default start date
1;2802;0c
now() was bad as it excluded the orders of the latest session
midnight is not good either because
- midnight server != midnight user (timezone)
- some restaurant, bars start in the evening and finish after midgnight

With this default, with 4 sessions:
- POS A, start 2016-12-21 08:05:36
- POS B, start 2016-12-21 08:08:11
- POS A, start 2016-12-22 08:17:51
- POS B, start 2016-12-21 08:19:23

The default start date will be 2016-12-22 08:17:51 to include all orders of
both sessions.

ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,hip-odoo/odoo,hip-odoo/odoo,hip-odoo/odoo,hip-odoo/odoo,dfang/odoo,ygol/odoo,ygol/odoo,dfang/odoo,hip-odoo/odoo,hip-odoo/odoo,dfang/odoo,dfang/odoo,ygol/odoo,dfang/odoo,dfang/odoo