Scriptparameter should be visible on 'define button'

Idea created by Markus Schneider on Aug 3, 2016

    buttons / button bars don't show scriptparameters. One has to open the 'select script' dialog to know if there's a parameter. Can be dangerous - a wrong or missing parameter can do wrong things.

    not so problematic when defining new buttons - but when reworking an interface, it can be terrible...