Only clear IME display options if SDL_HINT_IME_SHOW_UI is off (thanks opxdo!)

Fixes https://github.com/libsdl-org/SDL/issues/5153

src/video/windows/SDL_windowskeyboard.c

@@ -910,7 +910,9 @@ IME_HandleMessage(HWND hwnd, UINT msg, WPARAM wParam, LPARAM *lParam, SDL_VideoD
         IME_InputLangChanged(videodata);
         break;
     case WM_IME_SETCONTEXT:
-        *lParam = 0;
+        if (videodata->ime_uiless) {
+            *lParam = 0;
+        }
         break;
     case WM_IME_STARTCOMPOSITION:
         trap = SDL_TRUE;