Area assignment: status not shown correctly in activity list or activity overview

[ziggabyte]

Description

Area Assignments (which will be the new name for canvass assignments, changing in #2443) are one of six different types of "activities" in Zetkin (alongside events, call assignments, surveys, tasks and email).

Activities have lifecycles, which are slightly different depending on the activity. Area assignments can be drafts, or scheduled to be published at a future date, or published/started, or unpublished/ended.

The state is indicated in various places, but it seems like the different components are not consistent when it comes to how they render the state.

Steps to reproduce

1. Create an area/canvass assignment
2. Give it a name
3. Click "Start assignment"
4. Go to the activity overview (/organize/(orgId)/projects/(projectId) and see the assignment in the "today" section
5. Go to the "Activities" tab on the project, and see the assignment in the list
6. Now go back to the assignment
7. Click "End assignment"
8. Repeat step 4 and 5

Expected Behaviour

At step 4 and 5, the status dot, tooltip and explanation are correct and all agree, wherever you look

Actual Behaviour

At step 4 and 5, there is disagreement across the different components if the assignment is a draft, starting today, or closed.

Screenshots (if you have any)

When the assignment has been opened and then closed again, this is what it looks like in the various places:

In the assignment

In the activities list

In the activity overview