[Evolution-hackers] importers importing outside of local folders, bug 38461

[Not Zed <notzed ximian com>]

Looked into this problem - the whole importer framework explictly only
supports local folders.

I think to fix the current code will be more effort than its worth, as
nobody really knows how the code is supposed to work, and a lot of
changes are required.

Be easiest just to not let the user select a non-local folder, and fix
it when its rewritten.