### 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
CHECK(text_edit->get_last_full_visible_line_wrap_index() == 0);
	CHECK(text_edit->get_caret_wrap_index() == 0);
	SEND_GUI_ACTION("ui_text_caret_page_down");
	CHECK(text_edit->get_viewport()->is_input_handled());
	CHECK(text_edit->get_caret_line() == 42);
	CHECK(text_edit->get_first_visible_line() == 21);
	CHECK(text_edit->get_v_scroll() == 21);
	CHECK(text_edit->get_last_full_visible_line() == (visible_lines * 2) - 1);
	CHECK(text_edit->get_last_full_visible_line_wrap_index() == 0);
	CHECK(text_edit->get_caret_wrap_index() == 0);
	SEND_GUI_ACTION("ui_text_caret_page_up");
	CHECK(text_edit->get_viewport()->is_input_handled());
	CHECK(text_edit->get_caret_line() == 22);
	CHECK(text_edit->get_first_visible_line() == 21);
	CHECK(text_edit->get_v_scroll() == 21);
	CHECK(text_edit->get_last_full_visible_line() == (visible_lines * 2) - 1);
	CHECK(text_edit->get_last_full_visible_line_wrap_index() == 0);
	CHECK(text_edit->get_caret_wrap_index() == 0);
	SEND_GUI_ACTION("ui_text_caret_page_up");
	CHECK(text_edit->get_viewport()->is_input_handled());
	CHECK(text_edit->get_caret_line() == 2);
	CHECK(text_edit->get_first_visible_line() == 2);
	CHECK(text_edit->get_v_scroll() == 2);
	CHECK(text_edit->get_last_full_visible_line() == visible_lines + 1);
	CHECK(text_edit->get_last_full_visible_line_wrap_index() == 0);
	CHECK(text_edit->get_caret_wrap_index() == 0);
	
	text_edit->set_caret_line(0);
	text_edit->set_caret_column(0);
	text_edit->set_line_as_first_visible(5);