### 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_line(-1, "test");
			MessageQueue::get_singleton()->flush();
			CHECK(text_edit->get_line(0) == "te");
			SIGNAL_CHECK_FALSE("lines_edited_from");
			SIGNAL_CHECK_FALSE("caret_changed");
			SIGNAL_CHECK_FALSE("text_changed");
			SIGNAL_CHECK_FALSE("text_set");
			text_edit->set_line(1, "test");
			MessageQueue::get_singleton()->flush();
			CHECK(text_edit->get_line(0) == "te");
			SIGNAL_CHECK_FALSE("lines_edited_from");
			SIGNAL_CHECK_FALSE("caret_changed");
			SIGNAL_CHECK_FALSE("text_changed");
			SIGNAL_CHECK_FALSE("text_set");
			ERR_PRINT_ON;
		}
		SUBCASE("[TextEdit] swap lines") {
			((Array)lines_edited_args[1])[1] = 1;
			text_edit->set_text("testing\nswap");
			MessageQueue::get_singleton()->flush();
			CHECK(text_edit->get_text() == "testing\nswap");
			SIGNAL_CHECK("text_set", empty_signal_args);
			SIGNAL_CHECK("lines_edited_from", lines_edited_args);
			SIGNAL_CHECK("caret_changed", empty_signal_args);
			SIGNAL_CHECK_FALSE("text_changed");
			text_edit->set_caret_column(text_edit->get_line(0).length());
			MessageQueue::get_singleton()->flush();
			SIGNAL_CHECK("caret_changed", empty_signal_args);
			((Array)lines_edited_args[1])[1] = 0;
			Array swap_args;