Remove firsthover

[giacomobg]

firsthover is a variable that only creates an event for analytics if it's the first time someone hovers over the map (I think!).

However, this is unnecessary since analytics show separately 'Total events' and 'Unique events', meaning that if we remove this unique events will still tell us how many 'firsthovers' happen and total events will tell us how many areas people hover over around the map before getting bored and moving on.

[giacomobg]

Oh maybe each hover over a different area is a new unique hover in the analytics... in which case this kind of mechanic might be necessary to understand how many people hover rather than just how many areas get hovered over