### 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
ERR_PRINT_OFF;
		text_edit->remove_caret(-1);
		text_edit->remove_caret(5);
		ERR_PRINT_ON;
		CHECK(text_edit->get_caret_count() == 2);
		SIGNAL_CHECK_FALSE("caret_changed");
		text_edit->remove_caret(0);
		SIGNAL_CHECK_FALSE("caret_changed");
		CHECK(text_edit->get_caret_count() == 1);
		CHECK(text_edit->get_caret_line(0) == 0);
		CHECK(text_edit->get_caret_column(0) == 1);
		ERR_PRINT_OFF;
		text_edit->remove_caret(0);
		CHECK(text_edit->get_caret_count() == 1);
		ERR_PRINT_ON;
	}
	SUBCASE("[TextEdit] caret index edit order") {
		Vector<int> caret_index_get_order;
		caret_index_get_order.push_back(1);
		caret_index_get_order.push_back(0);
		CHECK(text_edit->add_caret(1, 0));
		CHECK(text_edit->get_caret_count() == 2);
		CHECK(text_edit->get_caret_index_edit_order() == caret_index_get_order);
		text_edit->remove_secondary_carets();
		text_edit->set_caret_line(1);
		CHECK(text_edit->add_caret(0, 0));
		CHECK(text_edit->get_caret_count() == 2);
		caret_index_get_order.write[0] = 0;
		caret_index_get_order.write[1] = 1;
		CHECK(text_edit->get_caret_index_edit_order() == caret_index_get_order);