Improve Countries, States and Provinces lists

Adds the events on_get_countries_list and on_get_states_provinces_list
that allow customizing Countries, States and Provinces lists.

...and, as a bonus, adds the list of Italian Provinces ;)
Removed includeDismissed login
Merge pull request #917 from mlocati/improve-countries-states-provinces-lists

Improve Countries, States and Provinces lists