Improve the list of results for large number of invalid phone

[samuelsov]

Some addition that could be handy for larger database cleanup:

• Add a pager to be able to see more than the first 50 results
• Make the hide button permanent so that we can exclude some number (the same way "Not a duplicate" works)
• Show the primary address country of the contact
• Be able to sort the results by any column (contact name, phone or country)

[JohnFF]

These are good ideas.