Fix event duration

[nalves599]

Is this change 5d8c88b right @PMax5? Wouldn't it be + 1 instead of - 1?
I think that we want to ignore the hours, and only look at the days (i.e. from the 15th to the 19th of April, it's 5 days, 19 - 15 + 1 = 5). Does it make sense? Sorry for my mistake, since you are using the new Date(endDate - beginDate).getUTCDate() it already is 5. So you don't need to increment or decrement.

Another issue that references the event duration is this line that should use event.end instead of event.duration.

- {{english ? (event.begin | dateEn: event.duration) : (event.begin | datePt: event.duration) }}
+ {{english ? (event.begin | dateEn: event.end) : (event.begin | datePt: event.end) }}