### Godot version

v4.0.beta.custom_build [13f0158]

### System information

Windows 10

### Issue description

When doing operations (`begin_complex_operation` and `end_complex_operation`) with multiple selections in TextEdit, some of these selections don't revert upon undo. This behavior is affects some of script editor's operations, like duplicate selection and delete lines.

### Steps to reproduce

Open script editor, make multiple selections. Keep in mind what you have selected. Do duplicate selection (ctrl+shift+D). Undo (ctrl+Z). Compare the result to what you remember.

### Minimal reproduction project

N/A
return carets.size();
}
void TextEdit::add_caret_at_carets(bool p_below) {
	Vector<int> caret_edit_order = get_caret_index_edit_order();
	for (const int &caret_index : caret_edit_order) {
		const int caret_line = get_caret_line(caret_index);
		const int caret_column = get_caret_column(caret_index);
		
		
		
		int caret_from_column = 0, caret_to_column = 0, caret_last_fit_x = carets[caret_index].last_fit_x;
		if (has_selection(caret_index)) {
			
			if (get_selection_from_line(caret_index) != get_selection_to_line(caret_index)) {
				deselect(caret_index);
			} else {
				caret_from_column = get_selection_from_column(caret_index);
				caret_to_column = get_selection_to_column(caret_index);
				caret_last_fit_x = -1;
				carets.write[caret_index].last_fit_x = _get_column_x_offset_for_line(caret_column, caret_line, caret_column);
			}
		}
		
		int new_caret_line, new_caret_column, new_caret_from_column = 0, new_caret_to_column = 0;
		_get_above_below_caret_line_column(caret_line, get_caret_wrap_index(caret_index), caret_column, p_below, new_caret_line, new_caret_column, caret_last_fit_x);
		
		if (caret_from_column != caret_to_column) {