### 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.
} break;
				case WM_XBUTTONUP: {
					mb->set_pressed(false);
					if (HIWORD(wParam) == XBUTTON1) {
						mb->set_button_index(MouseButton::MB_XBUTTON1);
					} else {
						mb->set_button_index(MouseButton::MB_XBUTTON2);
					}
				} break;
				case WM_XBUTTONDBLCLK: {
					mb->set_pressed(true);
					if (HIWORD(wParam) == XBUTTON1) {
						mb->set_button_index(MouseButton::MB_XBUTTON1);
					} else {
						mb->set_button_index(MouseButton::MB_XBUTTON2);
					}
					mb->set_double_click(true);
				} break;
				default: {
					return 0;
				}
			}
			mb->set_ctrl_pressed((wParam & MK_CONTROL) != 0);
			mb->set_shift_pressed((wParam & MK_SHIFT) != 0);
			mb->set_alt_pressed(alt_mem);
			
			if (mb->is_pressed()) {
				last_button_state.set_flag(mouse_button_to_mask(mb->get_button_index()));
			} else {
				last_button_state.clear_flag(mouse_button_to_mask(mb->get_button_index()));