Add a 'clicks' overview tab to the subscriber profile page

[samtuke]

Add a tab to the subscriber profile page, which lists all clicks that subscriber has ever performed, across all campaigns, with links to general stats about each URL that they clicked, and also click stats for the last campaign in which that URL appeared.

Screenshots (if appropriate):

[samtuke]

One known issue exists which is that the table data is split over two rows when it could be a single row.

[samtuke]

Note this tab seems to duplicate functionality of /lists/admin/?page=userclicks&userid=1