Make it easier for people to add Backdrop-related events to their calendars

[jenlampton]

For people wanting to add individual events to their own personal calendar, backdropcms.org/news/events doesn't provide a way to do that. And It's a multiple step process to add a calendar item even if you're using Google Calendar.

We should find a way to add an "Add to my calendar" button to any event node on b.org. In the other issue someone suggested https://github.com/backdrop-contrib/addtocal.

This is a follow-up to #890

[olafgrabienski]

An actively maintained alternative to the "Add to Cal" module is Views iCal Export:

Using this module, you can attach an iCal feed to your views' page, so visitors are able to add your events to their calendar and get them updated automatically.

[yorkshire-pudding]

I've tested addtocal but it isn't working. I've raised a couple of issues.

I'm not sure that Views iCal Export is suitable unless someone wants all the events of a view. This might work if we have suitable filtering of the view and that can be used to define a feed.