Change status of todo from "done" to "undone"
Userstory
As a user , I want to manually set a todo with the status "done" as "undone" so that I can work on this todo again. .
Acceptance Criteria
- Instantly after setting a todo as "done" in the list of open todos, the status of the todo can be changed back to "undone"
- In the list of closed todos, a todo can be set as "undone". The todo is visible in the list of open todos.
The list for closed todos will be added in #577 (closed)
Needs !327 (merged) to be merged.
Edited by Steffen Schneider