[SL] Wrong number formating

[Giedrius <zl...@nk...>]

I have chosen "1000,00" format of number and now I receive false values
in Vendor Invoices and in Sales Invoices:

Subtotal:  	73,28
Tax 18%: 	1319,04
Total:       	1392,32

Version 2.8.5.
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Giedrius