Not quite what you are looking for… but I use a shape widget set to very low opacity that is grouped to a button. When the button is on, the shape widget is set to be off and vice versa.
I use the shape widget to cover up a pannel which effectively greys it out when I am not enabling that VST. In this case… it’s my backup Hammond Organ VST the B-3X. If I don’t have my organ with me or if something went wonky during a gig, I just click one button and several things happen (with out scripting) but one is the grey’d out pannel is now fully visible.
You can adjust the opacity of a shape using it’s ‘alpha’ channel value in the editor.
