Use profile country instead of rev-geo-coding for events map

[LorenzCK]

On the main events map, reverse geo coding is used to determine the user's country (and to create the "list all events in COUNTRY" button). For logged-in users, the country in the user's profile should be used directly:

• One less geo-coding request per view,
• Users are shown the correct country (e.g., Irish users mistakenly shown the UK landing page).

[ioana-chiorean]

• another scenario is checking the activities of your original country while traveling outside it