All you need to do is make a button that runs SetAttr as Leo has said.
Alternatively, you can download the entire default toolbar that contains the Properties Dropdown Menu from my post on the I think they are Japanese Colorful Icon set here.
https://resource.dopus.com/t/line-icons-colourful-ver/31653/7?u=david
These also require the Colorful Icon set installed to display properly.
Hovering shows the corresponding icon from the Colorful Icon Set and the text is in English.
I prefer to leave posting of the actual default Operations Toolbar to GPSoft.
Your point is well taken as it would be good to have an easy recovery built in other than a reset.