### Godot version

4.0 beta 15

### System information

Windows 10

### Issue description

It happened with both Google IME and MS-IME, and there was no problem until Beta14.
When typing Japanese characters, it is common to select a character from the suggestion window and then start typing the next character before confirming.
In this case, uncommitted characters are forcibly committed, and input of the next character begins.

**↓Beta15**

https://user-images.githubusercontent.com/186786/214753450-b493cca6-2644-4b3d-8cd2-660565cc3547.mp4

**↓Beta14**

https://user-images.githubusercontent.com/186786/214755127-dde819cc-4d63-403a-99b0-09821671f74e.mp4



### Steps to reproduce

It happened with both Google IME and MS-IME in beta15

### Minimal reproduction project

It is project independent and happens in the editor.
case SC_MONITORPOWER: 
					return 0; 
				case SC_KEYMENU:
					if ((lParam >> 16) <= 0) {
						return 0;
					}
			}
		} break;
		case WM_CLOSE: 
		{
			if (windows[window_id].focus_timer_id != 0U) {
				KillTimer(windows[window_id].hWnd, windows[window_id].focus_timer_id);
			}
			_send_window_event(windows[window_id], WINDOW_EVENT_CLOSE_REQUEST);
			return 0; 
		}
		case WM_MOUSELEAVE: {
			if (window_mouseover_id == window_id) {
				old_invalid = true;
				window_mouseover_id = INVALID_WINDOW_ID;
				_send_window_event(windows[window_id], WINDOW_EVENT_MOUSE_EXIT);
			} else if (window_mouseover_id != INVALID_WINDOW_ID && windows.has(window_mouseover_id)) {
				
				
				track_mouse_leave_event(windows[window_mouseover_id].hWnd);
			}
		} break;
		case WM_INPUT: {
			if (mouse_mode != MOUSE_MODE_CAPTURED || !use_raw_input) {
				break;