Ability to extend inspector with custom tools

[jaliborc]

Would be great to have the ability, with the official API, to add our own custom “tool sections" to the “tools” tab in the inspector.

When creating a “custom tool section”, we should be able to specify buttons we can click to run our tools, maybe a couple of checkboxes/sliders/colorpickers for configuring them.

[bghgary]

I was about to reply asking you to create an issue, but it looks like this thread is duplicated here: Add custom tool to inspector and the issue has already been created.