Don't send text event while ctrl/alt is held on X11/Wayland

(cherry picked from commit ac5b2b61024f48b0ee7f4d81856d0d1696c1bd24)

src/video/wayland/SDL_waylandevents.c

@@ -1884,7 +1884,7 @@ static void keyboard_handle_key(void *data, struct wl_keyboard *keyboard,
     SDL_SendKeyboardKeyIgnoreModifiers(timestamp, input->keyboard_id, key, scancode, state == WL_KEYBOARD_KEY_STATE_PRESSED);
 
     if (state == WL_KEYBOARD_KEY_STATE_PRESSED) {
-        if (has_text && !(SDL_GetModState() & SDL_KMOD_CTRL)) {
+        if (has_text && !(SDL_GetModState() & (SDL_KMOD_CTRL | SDL_KMOD_ALT))) {
             if (!handled_by_ime) {
                 SDL_SendKeyboardText(text);
             }

src/video/x11/SDL_x11events.c

@@ -977,7 +977,7 @@ void X11_HandleKeyEvent(SDL_VideoDevice *_this, SDL_WindowData *windowdata, SDL_
             X11_HandleModifierKeys(videodata, scancode, true, true);
             SDL_SendKeyboardKeyIgnoreModifiers(timestamp, keyboardID, keycode, scancode, true);
 
-            if (*text) {
+            if (*text && !(SDL_GetModState() & (SDL_KMOD_CTRL | SDL_KMOD_ALT))) {
                 text[text_length] = '\0';
                 X11_ClearComposition(windowdata);
                 SDL_SendKeyboardText(text);