I'm developing custom widgets for WAB (Develper Edtion) 2.17, Launchpad Theme, on 3D Scenes (ArcGIS API for javascript 4.17).
I need to change the title of my custom widget window, AFTER the widget has been opened, so that the title will be changed both in the widget-window-title and also in the widgets-group-panel.
I want the change to take effect only when the app is running, and vanish when the app is closed.
I'll appreciate info how to do it.