[FIX] Taxes not updated when invoicing sale lines

__Invoice__ created from _Sale Order Lines_ hasn't got __Taxes__ calculated. You have to click _Update_ link on amounts to calculate them.

h3. Steps to reproduce:
If we create a __Sale Order__ with _Create Invoice_ on demand, when click _Create Invoice_ button, select _Some order lines_ in wizard then _Show Lines to Invoice_ and finally select __lines__ push _More_ and __Create Invoice__.

Invoice lines have taxes but invoice _Tax_ amount is zero (0.0)

_This commit_ fix this bug and is based in _Make Invoice_ from __Sale Order__