### 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("lines_edited_from");
			
			SEND_GUI_ACTION("ui_text_caret_up");
			CHECK(text_edit->get_viewport()->is_input_handled());
			CHECK(text_edit->get_caret_line() == 0);
			CHECK(text_edit->get_caret_column() == 12);
			CHECK_FALSE(text_edit->has_selection(0));
			CHECK(text_edit->get_caret_line(1) == 4);
			CHECK(text_edit->get_caret_column(1) == 12);
			CHECK_FALSE(text_edit->has_selection(1));
			SIGNAL_CHECK("caret_changed", empty_signal_args);
			SIGNAL_CHECK_FALSE("text_changed");
			SIGNAL_CHECK_FALSE("lines_edited_from");
			text_edit->set_caret_column(12, false);
			
			SEND_GUI_ACTION("ui_text_caret_up");
			CHECK(text_edit->get_viewport()->is_input_handled());
			CHECK(text_edit->get_caret_line() == 0);
			CHECK(text_edit->get_caret_column() == 7);
			CHECK_FALSE(text_edit->has_selection(0));
			CHECK(text_edit->get_caret_line(1) == 4);
			CHECK(text_edit->get_caret_column(1) == 7);
			CHECK_FALSE(text_edit->has_selection(1));
			SIGNAL_CHECK("caret_changed", empty_signal_args);
			SIGNAL_CHECK_FALSE("text_changed");
			SIGNAL_CHECK_FALSE("lines_edited_from");
		}
		SUBCASE("[TextEdit] ui_text_caret_down") {
			text_edit->set_line_wrapping_mode(TextEdit::LineWrappingMode::LINE_WRAPPING_BOUNDARY);
			text_edit->set_size(Size2(110, 100));