Documentation Bug: Use case for add case command does not account for context

This issue reports a documentation bug that the use case for the add case command does not take into account the currently viewed page, i.e. Archive or Unarchived. Adding a case while on the Archive page adds an archive case and not an unarchived case, which is undocumented by the use case.

Steps to reproduce:

1. Start the application.
2. Run `list archive`.
3. Run `add case t:1`.
4. Run `list case`.
5. Notice that the added case is under the archive list and not the unarchived list.

Screenshot Example:

Severity: Low as it may be misleading to a new user.