If you click the link below, there's a button " New Issue" to the right. Click it and voila :-)
//edit: I see you did manage :)
You may use:
// Get the context of the HTMLsnippet Widget.
var context = this.mxcontext
// Get the MxObject of the context
var contextObj = context.getTrackObject();
This will give you the MxObject if available: https://apidocs.mendix.com/6/client/mendix_lib_MxObject.html.
The latest version of the widget allows you to do an update on refresh / reload of the object. However, I would really recommend you to write your own widget if you need entity specific logic.
See: https://github.com/mendix/generator-mendix, https://github.com/mendix/AppStoreWidgetBoilerplate and https://world.mendix.com/display/refguide6/XML+Reference+Guide for more details on how to do this.
Thanks Paul. I already tried it but I couldn't find anywhere to do it.
Your best bet would be to file a feature request on github: