[IMP] Display account field in purchase reciept when no supplier define
[MERGE] with 7.0
[MERGE] with 7.0
[MERGE] with 7.0
[IMP] improve domain
[FIX] pad: hide chatter in fullscreen mode
[FIX] account_voucher: account_id always visible on sales & purchase receipts

account_id is mandatory, and is set thanks to an onchange of partner_id. But partner_id is not required, therefore, if you do not set a customer/supplier, there is no
     account_id set by default.

On the purchase, the account_id was always invisible. Therefore, it was impossible to set the account_id if you did not set any supplier
On the sale, the account_id was invisible if you set the pay_now to pay later. Therefore, it was impossible to set an account_id if you did not set any customer and set pay later.

Anyway, now, account_id is always displayed, so the user can change the value of account_id if the default value provided is not was he wants, whatever the value of the other fields