Filter improved

Filtering by activities has been improved:

• It is now possible to filter on a company when you are not logged in on behalf of a company.
• The activity screen now displays a notification when the filter is active.
• You can also filter by type 'MKG Intern'.
• The button Filters Pin has been added, so that the filter remains set when you come back for your next visit.
• With the new buttons + and - you can add and remove multiple filter criteria.