fix: remove move handle from modal headers [SYNTH-186]

[rutmanz]

Task

SYNTH-186

Symptom

Solution

I made the regular cursor render on the modal headers

## Verification

The pointers look as you would expect them to look

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• All acceptance criteria outlined in the ticket are met.
• Necessary test cases have been added and updated.
• A feature toggle or safe disable path has been added (if applicable).
• User-facing polish:
  • Ask: "Is this ready-looking?"
• Cross-linking between Jira and GitHub:
  • PR links to the relevant Jira issue.
  • Jira ticket has a comment referencing this PR.

[AlexD717]

lgtm