Replace readmore.js with something that does not depend on deprecated/removed jQuery 1.7 features.

[yohell]

I put a silly red border around the part that I want to be able to click to show/hide, eg here:

http://neic.no/activities/tryggve/#neic-2017-sensitive-data-workshop

and here:

http://localhost:4000/activities/tryggve/#eudat-sensitive-data-meeting

The border comes from literal element style in _includes/activity.html. Feel free to nuke when you've got the message.

[yohell]

29048c4 adds this using readmore.js,

Not perfect, works on pixel height rather than after first paragraph. Hmmm... Maybe one could wrap only the second paragraph to a pixel height of 0?

Doesn't work on past activity outreach events for some reason.

Also, doesn't seem to obey the speed option.

[yohell]

Animations speed workaround in a95e6e4, also folding only the details to height 0px (and not folding the blurb) works.

A disturbing find: readmore relies on this.selector, which was deprecated in jquery 1.7 and removed in jquery 1.9. We use 3.2.1. As a workaround, I'm injecting the selector as an option when running the $().readmore() funtion.

[bast]

It is not completely clear to me whether this is now solved and if not what remains to be done before we can close this issue.

[yohell]

We are presently using a (hand-edited version of) <script src="{{ site.baseurl }}/assets/js/readmore.js"></script>, which uses deprecated/removed features of jQuery 1.7. I worked around this by injecting the missing information in the function call instead. Readmore was last updated a year ago https://github.com/jedfoster/Readmore.js. We should probably not use it.