Hi Maarten,
Did some questioning around.
The specific widget used is a custom build widget, which isn't generic enough at the moment to share. Which might happen in the future.
This widget will give you a kind a like behavior: https://marketplace.mendix.com/link/component/116604
The epics app model is not available for download, which is actually quite logical as it uses a lot Mx platform integrations which are not for your eyes ;-)