Show only future events in list & improved state management

[iPurpl3x]

As the list view was showing all event the of current year, and that list could be quite long, I thought it would be better to start the year at the date of now and show the event of the next floating year. Else, users might have to scroll a lot, to find current events!

While doing that change, I made some minor updates to libraries and improved state management to avoid re-rendering the whole calendar so often and avoid fetching data from the server when there has actually been no changes.

@eddiewebb, would you be so kind and merge this PR and release a new version with the changes? Thanks in advance.

[iPurpl3x]

@eddiewebb bump ;)

[eddiewebb]

Published as 1.7.0 @iPurpl3x , sorry for delay

[iPurpl3x]

Cool, thanks @eddiewebb