Make it possible to link an event to a contact.

In my calendar I can only link events to "clients",  "projects" or "nothing". Appointments and events are always with people at a certain address. If I make an appointment I now have the type the contact name and meeting address in into the  "extra information field" if I want to have that handy when traveling.  It would be more logical in the calendar to link the "contact" and when clicking on the contact get the record with the address.