Make activities feature more useful for events

This is an Nlnet milestone.

“Tweaks to make Activities-feature more useful for events”

Background:

Increase usability and interface refinements

We want to reduce the complexity in user experience and improve overall usability for all groups facing the complexity of self-governance. Also, Karrot still has some legacy interface and navigation design based on food saving type of groups. As new types of groups start using and experiment with Karrot, we started to identify different needs that do not necessarily require a new set of features, but that could be satisfied by making some tweaks and improvements to existing ones.