That looks good. I will check these When I’m back home but I was wondering about remaking pies for GP. After adding recent changes they started to look cluttered ( especially Open (all) , close (all). There was idea to make Open button show (all) - suffix only when shift key is pressed, but afaik it is impossible to do (unless I would add some background callback waiting detecting shift key - and then changing text…).
Delete - it deletes objects from group - otherwise they will stay in scene (as group instace) , so this button has be there somewhere.