Indeed, currently there is no built-in mechanics for disabling the default double-click behavior. If you have the time, please support the following feature request in our Feedback portal to help us estimate the customer demand for such an enhancement (customizable minimizing and maximizing behavior):
Meanwhile, you can use the following workaround - handle the regular DOM dblclick event
over the custom title bar contents, and prevent its immediate propagation, e.g.:
Customize the header styling to ensure that the whole title bar is affected by the modified behavior, and the "Close" button is still displayed and active (if needed).
I hope this helps.
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