fix(DatePicker): Date clears after invalid character is added.

[nikitaorliak-cengage]

Issue: #1524

What I did

Fix the bug when the date clears after an invalid character is added.

Screenshots:

Checklist

• [x] changeset has been added
• [x] Pull request description is descriptive
• [x] I have made corresponding changes to the documentation
• [x] New and existing unit tests pass locally with my changes
• [ ] I have added tests that prove my fix is effective or that my feature works

How to test

Open DatePicker in the docs -> Select Minimum and Maximum dates -> Enter a character OR select a date and then add an invalid character -> See that error appears.

[changeset-bot[bot]]

🦋 Changeset detected

Latest commit: 381775a0913327d89475fb86c6432b00f9129b56

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

| Name | Type | | --------------- | ----- | | react-magma-dom | Patch |

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