Add list data-structure of types
Rename subcategories => category_types
Remove unused context variable
Render category types as filter buttons
Toggle showing the relevant category types
Use sliding animation to show types
Exclude volunteerwork from category type filters
Reset selected category types when changing category
Include selected category types in filter request
Filter the request on category type server-side
Select aktiviteter distinctly
Merge branch 'aktivitet-type-filter'