More clarity during lead list import process as well as a record of used verification credits.

When uploading a list it appears blank for quite some time, causing confusing and then duplicate imports, resulting in double use of verification credits. After upload a status should be shown until the full list is shown. And when the list does appear it should tell how many were imported and how many weren't. And the verification credits should show a log of how they were used instead of just a number that gets decreased.