### Godot version

Godot 4.0 statble

### System information

Windows 10

### Issue description

TextEdit boundary wrapmode not works, it only removes the horizontal scrollbar

### Steps to reproduce

Add a textedit in editor, set  the wrap mode to boundary, type something.

### Minimal reproduction project

![image](https://user-images.githubusercontent.com/9168814/224538077-2efb4e67-8976-496e-9223-c460365ecc28.png)
![image](https://user-images.githubusercontent.com/9168814/224538084-af773b86-d73a-4e8b-9b66-a0fb4bde1168.png)

dragging_selection = true;
	Point2 mp = get_local_mouse_pos();
	Point2i pos = get_line_column_at_pos(mp);
	int line = pos.y;
	int col = pos.x;
	int caret_idx = carets.size() - 1;
	select(carets[caret_idx].selection.selecting_line, carets[caret_idx].selection.selecting_column, line, col, caret_idx);
	set_caret_line(line, false, true, 0, caret_idx);
	set_caret_column(col, true, caret_idx);
	queue_redraw();
	click_select_held->start();
	merge_overlapping_carets();
}
void TextEdit::_update_selection_mode_word() {