SDCH-3881: fix 'archived' page, renamed to 'finished'

atdb/atdb/static/taskdatabase/style.css

atdb/taskdatabase/static/taskdatabase/style.css

atdb/taskdatabase/templates/astronauth/navbar.html

...taskdatabase/templates/taskdatabase/archived/headers.html

atdb/taskdatabase/templates/taskdatabase/archived/page.html

atdb/taskdatabase/templates/taskdatabase/archived/tasks.html

...atabase/templates/taskdatabase/filter/filter_buttons.html

atdb/taskdatabase/templates/taskdatabase/index.html

.../templates/taskdatabase/query/set_multi_status_panel.html

.../templates/taskdatabase/query/status_buttons_per_row.html

...base/templates/taskdatabase/tasks/set_status_buttons.html

atdb/taskdatabase/urls.py

atdb/taskdatabase/views.py