Hungarian law says that the employer can only claim IP rights if there was a clear order from the employer to create the new stuff. I think this is a good approach too.

I'm guessing you should probably double check that section either way, as I would be surprised if the broad language is legally binding. At least in Norway, adding text to a contract that overreach (ie: tries to enforce a clause that is effectively illegal) generally voids the contract (or at the very least that section) - falling back to standard/minimal protection afforded by the law. This would (in Norway) probably be great for your employees, but maybe not what you want as a company.

As far as I know, several European jurisdictions would work in a similar way.