Custom handles with icons cannot be dragged

[CharlieWinkwaves]

Subject of the issue

When using a custom handle and the handle contains an icon the item can only be dragged when the user grabs the button. If the icon is grabbed the item cannot be dragged

Your environment

gridstack 10.2.0 Mac, Chrome v125.0.6422.144 Also reproduced on a linux system with chromium as browser

Steps to reproduce

https://jsfiddle.net/m3Lqx4ka/4/

Expected behavior

I expect the icon to also be used to grab as it is part of the button. It does work when using text inside the button. So why not icons

I added a screenshot of our handle with the icon inside.