fix!!: Make default sort order sort first by status type

[claremacrae]

Description

• Document the default sort order
• Fix problem that old, high-priority DONE tasks were often sorted before current IN_PROGRESS and DONE tasks.

I've documented this as a fix that is potentially a breaking change, just because it is so fundamental.

But it's clearly an improvement.

Motivation and Context

Fixes #439

How has this been tested?

• Via approval tests to visualise the change in behaviour.
• Exploratory testing.

Screenshots (if appropriate)

Here is a screenshot of the changes in sort order for a sample selection of tasks in the tests.

In the new order, the tasks are clearly sorted in order IN_PROGRESS, TODO, DONE, CANCELLED then NON_TASK.

Types of changes

Changes visible to users:

• Breaking change (prefix: feat!! or fix!! - fix or feature that would cause existing functionality to not work as expected)
• Documentation (prefix: docs - improvements to any documentation content for users)

Internal changes:

• Refactor (prefix: refactor - non-breaking change which only improves the design or structure of existing code, and making no changes to its external behaviour)
• Tests (prefix: test - additions and improvements to unit tests and the smoke tests)

Checklist

• My code follows the code style of this project and passes yarn run lint.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• My change has adequate Unit Test coverage.

Terms

• My contribution follow this project's contributing guide
• I agree to follow this project's Code of Conduct