Show user permissions in user list

Kanban ticket: https://aptivate.kanbantool.com/boards/5986-econsensus#tasks-1698335
(Original description: https://aptivate.kanbantool.com/boards/5986-econsensus#tasks-1617009)

User permissions added using a template filter. At the moment there is no 'user type' - each user just is_admin/has the edit permission/is the owner so the filter works out the user type based on these values. Let me know of any changes that need to be made!