### 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
SIGNAL_CHECK_FALSE("text_changed");
			SIGNAL_CHECK_FALSE("lines_edited_from");
		}
		SUBCASE("[TextEdit] ui_text_caret_document_start") {
			text_edit->set_line_wrapping_mode(TextEdit::LineWrappingMode::LINE_WRAPPING_BOUNDARY);
			text_edit->set_size(Size2(110, 100));
			text_edit->set_text("this is some\nother test\nlines\ngo here");
			text_edit->set_caret_line(4);
			text_edit->set_caret_column(7);
			text_edit->add_caret(3, 2);
			CHECK(text_edit->get_caret_count() == 2);
			MessageQueue::get_singleton()->flush();
			CHECK(text_edit->is_line_wrapped(0));
			SIGNAL_DISCARD("text_set");
			SIGNAL_DISCARD("text_changed");
			SIGNAL_DISCARD("lines_edited_from");
			SIGNAL_DISCARD("caret_changed");
#ifdef MACOS_ENABLED
			SEND_GUI_KEY_EVENT(Key::UP | KeyModifierMask::CMD_OR_CTRL | KeyModifierMask::SHIFT);
#else
			SEND_GUI_KEY_EVENT(Key::HOME | KeyModifierMask::CMD_OR_CTRL | KeyModifierMask::SHIFT);
#endif
			CHECK(text_edit->get_viewport()->is_input_handled());
			CHECK(text_edit->get_text() == "this is some\nother test\nlines\ngo here");
			CHECK(text_edit->get_caret_line() == 0);
			CHECK(text_edit->get_caret_column() == 0);
			CHECK(text_edit->get_selected_text() == "this is some\nother test\nlines\ngo here");
			CHECK(text_edit->has_selection());
			SIGNAL_CHECK("caret_changed", empty_signal_args);
			SIGNAL_CHECK_FALSE("text_changed");