fix: Warn in Edit Task modal about Status-editing limitations

[claremacrae]

Description

• Add a message in the modal to say that changing status does only that
• Update screenshot to show the new warning

Motivation and Context

• Fix Add message in modal to say that changing status does only that #1631

How has this been tested?

• Exploratory testing in local vault

Screenshots (if appropriate)

Types of changes

Changes visible to users:

• Bug fix (prefix: fix - non-breaking change which fixes an issue)
• Documentation (prefix: docs - improvements to any documentation content for users)

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