This variable sets the title of the TextInput window on GDK platforms.
Defined in <SDL3/SDL_hints.h>
#define SDL_HINT_GDK_TEXTINPUT_TITLE "SDL_GDK_TEXTINPUT_TITLE"
This hint is available only if SDL_GDK_TEXTINPUT defined.
This hint should be set before calling SDL_StartTextInput()
This hint is available since SDL 3.0.0.