### 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.
}
					merge_overlapping_carets();
				}
				if (context_menu_enabled) {
					_generate_context_menu();
					menu->set_position(get_screen_position() + mpos);
					menu->reset_size();
					menu->popup();
					grab_focus();
				}
			}
		} else {
			if (mb->get_button_index() == MouseButton::LEFT) {
				if (selection_drag_attempt && is_mouse_over_selection()) {
					remove_secondary_carets();
					Point2i pos = get_line_column_at_pos(get_local_mouse_pos());
					set_caret_line(pos.y, false, true, 0, 0);
					set_caret_column(pos.x, true, 0);
					deselect();
				}
				dragging_minimap = false;
				dragging_selection = false;
				can_drag_minimap = false;
				click_select_held->stop();
				if (!drag_action) {
					selection_drag_attempt = false;
				}
				if (DisplayServer::get_singleton()->has_feature(DisplayServer::FEATURE_CLIPBOARD_PRIMARY)) {
					DisplayServer::get_singleton()->clipboard_set_primary(get_selected_text());
				}