Sort by name/date in events overview admin

Ghost User
2018-09-26T20:27:07+02:00

### One-sentence description Sort by date in events overview admin ### Desired behaviour The events in the admin overview (/admin/events) are sorted by id by default. Since we have overridden the event name, date and registration start columns for them to be a link and contain the week day respectively these are not sortable automatically anymore. This could be solved by adding the `admin_order_field` attribute: ``` def colored_first_name(self): return format_html( '{}', self.color_code, self.first_name, ) colored_first_name.admin_order_field = 'first_name' ``` - Overview link: `title` (if possible due to translation) - Date: `start` - Registration start: `registration_start`