Custom scriptable user panels
Operating System: All
Description of the feature
Photoshop has the ability to create your own custom panels with controls that allow you to automate processes.
They not only execute some kind of script, but also have a responsive UI (toggles, buttons, options, changing icons, custom design etc.)
Now I think it can be achieved in GIMP only by writing a plugin on C/C++. Scripts on script-fu and plugin-fu have either simple functionality or a complex approach to writing an interface through PyGTK. And I'm not sure if such dialogs will be open if I try to run another plugin in parallel or select other tool.
Some examples from internet:
Can it be achieved in GIMP?