Also, heavily borrowing the style from FinalCut Pro for their inspector.

My original attempt on the left, the one where I start to use fonts, spacing and bubbles from FinalCutPro styled on the right - still a work in progress, but it already feels better:

inspector(isPresented:content:) | Apple Developer Documentation

Inserts an inspector at the applied position in the view hierarchy.

Apple Developer Documentation
@ivancr I am, yes; but I am considering rolling out my own inspector/sidebar
@Migueldeicaza how so? If you have any particular issues with the API please share FB numbers

@ivancr taking advantage of your suggestion to provide FBs.

I got two big challenges with the toolbar/inspector right now. I provided single-file repro test cases for functionality loss and crashes (same code, different ways to trigger):

- FB15103713
- FB15105678

@Migueldeicaza @ivancr thanks for the feedbacks! They're routing to the right folks now.
@curtclifton @ivancr Thank you Curt! This is music to my ears!