Add in loop ProductSaleElements the order argument

add order arguments 'min_quantity' and 'max_quantity'
change min_quantity & max_quantity

change :

min_quantity by quantity
max_quantity by quantity_reverse
Merge pull request #525 from zzuutt/patch-5

Added sort order on quantity in ProductSaleElements's loop
Fixed method to display options in the current local and not en_US.
Fixed order edit. When a product was deleted, the title was blank. Now we use the order_product title.
Added direct link to the customer page on order detail.
Fixed wrong calculated price when comma is used instead of dot.
Revert "Fixed wrong calculated price when comma is used instead of dot."

This reverts commit 1a3542ada2dd63f59adeafc0d1f434057d5da927.
Fixed wrong calculated price when comma is used instead of dot.
added toolbar