Update imconfig.h documentation

imconfig.h

@@ -18,6 +18,12 @@
 //#define IMGUI_API __declspec( dllexport )
 //#define IMGUI_API __declspec( dllimport )
 
+//---- Include imgui_user.inl at the end of imgui.cpp so you can include code that extends ImGui using its private data/functions.
+//#define IMGUI_INCLUDE_IMGUI_USER_INL
+
+//---- Include imgui_user.h at the end of imgui.h
+//#define IMGUI_INCLUDE_IMGUI_USER_H
+
 //---- Don't implement default handlers for Windows (so as not to link with OpenClipboard() and others Win32 functions)
 //#define IMGUI_DISABLE_WIN32_DEFAULT_CLIPBOARD_FUNCS
 //#define IMGUI_DISABLE_WIN32_DEFAULT_IME_FUNCS
@@ -25,11 +31,8 @@
 //---- Don't implement help and test window functionality (ShowUserGuide()/ShowStyleEditor()/ShowTestWindow() methods will be empty)
 //#define IMGUI_DISABLE_TEST_WINDOWS
 
-//---- Include imgui_user.inl at the end of imgui.cpp so you can include code that extends ImGui using its private data/functions.
-//#define IMGUI_INCLUDE_IMGUI_USER_INL
-
-//---- Include imgui_user.h at the end of imgui.h
-//#define IMGUI_INCLUDE_IMGUI_USER_H
+//---- Implement STB libraries in a namespace to avoid conflicts
+//#define IMGUI_STB_NAMESPACE     ImStb
 
 //---- Define constructor and implicit cast operators to convert back<>forth from your math types and ImVec2/ImVec4.
 /*