### Godot version

v4.0.3.stable.official [5222a99f5]

### System information

Windows 11, AMD Ryzen 5 3500U with Radeon Vega Mobile Gfx     2.10 GHz

### Issue description

  The request_attention () function on Windows only flashes the taskbar, but what if the taskbar is hidden ?  In display_server_windows.cpp, FLASHW_TRAY is used, when it might be more appropriate to use FLASHW_ALL which flashes both the caption and the tray.

### Steps to reproduce

N/A

### Minimal reproduction project

N/A
ImmSetCandidateWindow(windows[window_id].im_himc, &cf);
			cf.dwStyle = CFS_EXCLUDE;
			cf.rcArea.left = windows[window_id].im_position.x;
			cf.rcArea.right = windows[window_id].im_position.x;
			cf.rcArea.top = windows[window_id].im_position.y;
			cf.rcArea.bottom = windows[window_id].im_position.y;
			ImmSetCandidateWindow(windows[window_id].im_himc, &cf);
			if (windows[window_id].ime_active) {
				SetCaretPos(windows[window_id].im_position.x, windows[window_id].im_position.y);
				OS::get_singleton()->get_main_loop()->notification(MainLoop::NOTIFICATION_OS_IME_UPDATE);
			}
		} break;
		case WM_INPUTLANGCHANGEREQUEST: {
			
		} break;
		case WM_IME_STARTCOMPOSITION: {
			if (windows[window_id].ime_active) {
				windows[window_id].ime_in_progress = true;
				if (key_event_pos > 0) {
					key_event_pos--;
				}
			}
			return 0;
		} break;
		case WM_IME_ENDCOMPOSITION: {
			if (windows[window_id].ime_active) {
				windows[window_id].ime_in_progress = false;
				windows[window_id].ime_suppress_next_keyup = true;
			}
			return 0;