C++: The last signal handler change only worked with Clang/LLVM. Less desirable but cross platform solution, attach all signal handlers on widget creation, when called if not overridden remove the unused handler. Started the work of filling in the widget classes and functions.

--- a/dwtestoo.cpp	Sat Dec 17 21:39:00 2022 +0000
+++ b/dwtestoo.cpp	Sun Dec 18 11:40:22 2022 +0000
@@ -1,6 +1,6 @@
 #include <dw.hpp>
 
-class MyWindow : public DW::Window<MyWindow>
+class MyWindow : public DW::Window
 {
 public:
   MyWindow() {