Changes to robot origin in the UI are not reset by "Reset World"

[twells46]

Fixes the small annoyance where user changes to the robot's starting position would be reset on "Reset World."

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Note

Ensures user-updated robot positions persist across "Reset World".

• In OverlayLayout.tsx and SideLayout.tsx, onRobotOriginChange_ now sets both origin and startingOrigin on the robot via onNodeChange.

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[erinharrington-12]

This patch works to keep the set robot position persistent in the scene, but doesn't apply in the challenge. Please edit to include.