Importing creates (visual) duplicates

[linwiz]

If you import a mpsites file while entries already exist then duplicate entries are created. Maybe the user should be prompted which entry to keep for each site and then discard the other one.

[ttyridal]

As long as the match string is not modified on existing entry (ie matches sitename) it will actually not create a duplicate. It will look that way, since it's appended in the gui, but on storage the existing entry is overwritten (without any warnings)

So if you close and re-open the config window you'll not have duplicates.

Now, silent overwrite is probably not a desired behaviour...

[ttyridal]

fix committed and beta software released