I hope someone else can give some more details, but Ignition is built on Java Swing. So all methods for things like JFrames are theoretically available - I’ve done things like disabling menu buttons on the top menu bar, and changing the icon for the window (getting the overall window using SwingUtilities.getWindowAncestor(component)).
From here, you can do something like whats shown here, but you’d have to translate that to Python.
Also you should know that none of this is supported by IA through their support channels.