Accept both comma and dot as decimal separator

[vmoriaux]

I'm running LubeLogger using the FR local. This means the decimal separator is "," (comma). Yet when entering the cost or any numerical value, I use my numpad which only contains a "." for the decimal separator.
Most office applications (calc, spreadsheet, etc.) accept both separators for input fields. So I use the "." and LubeLogger silently discard the value (defaults to 0 for the cost for example). So I need to be careful and watch my fingers to make sure I use the comma and not the dot. Then double check that the cost (for example) is persisted after I create a new service record (for example) just in case I automatically/mechanically used the dot as I do in any other app.