#101 Line numbers in invoice

[iTea]

It would be very handy if a consecutive line number
appears before each entry in the invoice. In that way
you can easily check if the number of lines in your
invoice corresponds with the number of lines in your
order.

[PieterValentijn]

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user_id=1017140

A total lines woul dhelp here i gess.
Thats not to mutch work.