Improving CSV import/export
There are few points that could be improved in the CSV import/export:
- the export doesn't allow to define the syntax (as import does) like the delimiter, the quote char, the encoding.
- the import doesn't have the DnD feature added to export in r4d37fcb2e60f
- the encoding is limited to utf-8 and latin1
Also the default values are not so good for Windows user because Excel expect encoding to be cp1252 instead of utf-8. Also Excel expects a ';' as delimiter instead of ',' for locale that has ',' as decimal separator.
Finally, there is a lot of code duplication between both window, we could merge it.