fix: custom divider #87
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Fix an issue with the custom divider that was causing a re-render on any divider hover (setState call).
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This PR resolves #86 by fixing a bug where the controller was re-settting the children anytime a divider changed, e.g. when an
onHovertriggered asetStatethat updated the divider's color.Instead of using a deep-equality check on the
didUpdateWidgethook, we're now just checking whether the length of the list of children changed. If this is not adequate, we may have to explore some different options in a future issue/PR.