I currently see two international keyboard issues:

- French Keyboard and Backend SDL2 - Several keys are not checkable with IsKeyDown

- Wrong ImGuiKey keydown indexes reported from Win32 backend for some keys when using UK keyboard with UK keyboard layout

There are also 2 issues with IME:

- Marked Text / SDL_TEXTEDITING Event / IME Composition support

- Backspace handling by text widget in default Windows IME environment.