"This file is a work of progress, if you have suggestions for it, please post them on the mailinglist."
BTW, problems in documentation should have the [BUG] label?
BTW2 Is this the right place to discuss about documentation?
BTW3 the mailing list is becoming populated with spam :@@@@
While empty rectangle in layout designer is usually enough for seldom used widgets, you can also tech TheIDE to show something better using .usc script file: