Add localization options for CSV export

[jtommi]

As you might know, CSV formatting depend on the localization of your PC.
Here in Belgium a CSV uses semi-colon as field separator and comma as decimal separator.

Since most exports I do will be used by basic Excel users, this is a blocker for me.

So the suggestion is to add settings for CSV field separator and CSV decimal separator.
CSV field separator I'd suggest a choice between comma and semicolon (and maybe tabs while we're add it).
CSV decimal separator, period and comma should be enough.

What do you think?

[RnoldR]

Second that! I noticed something similar for the export to .csv to clipboard (#712) that was granted. Please add it to exporting to file as well.
That it is possible to export the results at all, however, is extremely appreciated.

[cornettew]

This feature would be very useful. Any chance it will be available soon ?

[gjsjohnmurray]

Any chance it will be available soon ?

Probably not unless someone contributes a PR.