Emitted when the user enables or disables interactive debugging.
TRUE, interactive debugging is toggled on or off,
when it is
FALSE, the debugger will be pointed at the widget
under the pointer.
This is a keybinding signal.
The default bindings for this signal are Ctrl-Shift-I and Ctrl-Shift-D.
The default handler is called after the handlers added via
|Signal can be directly emitted on objects from user code