### 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
text_edit->set_caret_column(0);
	MessageQueue::get_singleton()->flush();
	SIGNAL_DISCARD("caret_changed");
	SUBCASE("[TextEdit] add remove caret") {
		
		CHECK(text_edit->add_caret(0, 0) == -1);
		MessageQueue::get_singleton()->flush();
		SIGNAL_CHECK_FALSE("caret_changed");
		
		text_edit->select(0, 0, 2, 4);
		CHECK(text_edit->add_caret(0, 0) == -1);
		CHECK(text_edit->add_caret(2, 4) == -1);
		CHECK(text_edit->add_caret(1, 2) == -1);
		
		CHECK(text_edit->add_caret(-1, 0) == -1);
		CHECK(text_edit->add_caret(5, 0) == -1);
		CHECK(text_edit->add_caret(0, 100) == -1);
		MessageQueue::get_singleton()->flush();
		SIGNAL_CHECK_FALSE("caret_changed");
		CHECK(text_edit->get_caret_count() == 1);
		text_edit->deselect();
		SIGNAL_CHECK_FALSE("caret_changed");
		CHECK(text_edit->add_caret(0, 1) == 1);
		MessageQueue::get_singleton()->flush();
		SIGNAL_CHECK("caret_changed", empty_signal_args);
		CHECK(text_edit->get_caret_count() == 2);
		CHECK(text_edit->get_caret_line(0) == 0);
		CHECK(text_edit->get_caret_column(0) == 0);
		CHECK(text_edit->get_caret_line(1) == 0);
		CHECK(text_edit->get_caret_column(1) == 1);