Consider adding higher-order components for visibility of e.g. action buttons.

Currently some top level container component does the logic, and passes a `can-xxx?` parameter to a view component. Some of these could be automated / made a pattern. We trust the `text` component, which is not actually a purely functional view component, to be used inside other "purely functional view components". Following the same logic we could have our own framework-y higher-order components that help in implementing our common "is component visible to this role" or "is action enabled here" type of situations.