### 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
if (GDVIRTUAL_CALL(_handle_unicode_input, p_unicode, p_caret)) {
		return;
	}
	_handle_unicode_input_internal(p_unicode, p_caret);
}
void TextEdit::backspace(int p_caret) {
	if (GDVIRTUAL_CALL(_backspace, p_caret)) {
		return;
	}
	_backspace_internal(p_caret);
}
void TextEdit::cut(int p_caret) {