Separate STL Build Is No More

Since almost 20 years (see this commit ) wxWidgets had a separate “STL build mode”, in which it used the standard library classes instead of the legacy code originally written even earlier because the standard library hadn’t been universally available under all platforms back then. This build mode provided better interoperability with the rest of the code, using the standard C++, at the cost of less than perfect backwards compatibility. The bad news is that the separate STL build mode doesn’t exist in wxWid