Name of this widget - where do I look?

[freyalupen]

You can use the Plugin Developer Tools plugin to find information about widgets:

Python Plugin Developer Tools

Introducing Python Plugin developer Tools! The goal of these tools is to make it easier for people to develop python plugins. Current features include: Selector/Sampler - for selecting with the mouse PyQt5 objects. Hold the shift key(or optionally ctrl/alt/meta key) and move the mouse as you wish, when you find the item you want, let go of the shift and it will show up in inspector. Inspector - Lets you browse/search the PyQt5 tree and also view all the properties (including inher…