Collapsible results

[hannah-sems]

Result page:

• Top five elements shown per category
• Expand all result elements via 'show all'
• Collapse whole category via click on title

Please review and merge if you don't see any problems.

[Meisenburger13]

It works well, I would just consider changing the text of "Show all __ results..." when it is already expanded to "Show less", if that's possible. Also I don't think people would get the idea of clicking on the title of a category to close it completely, maybe a little triangle would make it more intuitive? I works very well though, so we could also merge it like this for now and then talk about the exact layout later, in my opinion