Cart addon: Adding the next service to the same booking slot

When clicking on "Add another Item" button in the cart, the customer must choose all parameters again, like service, location, staff, date and time.

But sometimes all they want to do is to aggregate another service to the reservation they already chose on the first service that was added to the cart.

The Cart addon could have a setting so that when the customer clicks to add another item, it returns to the service choosing step with all the other parameters copied from the booking that is already in the cart, like location, staff, date, duration and time.

This way our customers could simply add another service that will be aggregated with the same reservation slot that they already have in the cart, just with a different service.

In my case, a music studio, the customer would first add a rehearsal room booking to the cart, with their preferred duration (custom duration addon), date and time.

When clicking "Add another service" in the cart, they would return to the service selection page only to choose an option of renting an instrument together with this booking (rehearsal studio + guitar, for example).

Th Extra items addon is not very helpful in my case, for many reasons.

So adding instrument rental as an actual service is much better for me, but when my customer clicks on "Add to Cart", they have to choose the whole reservation again (location, staf, date, time, etc...), which is cumbersome when all they want is to add an instrument rental together with their main booking.

Another good addition to the Cart Addon with this new option, would be to set a specific "additional services category" for each service, so that when this service is in the cart and the customer clicks on "Add another service" button, the booking form will show a filtered list of services with only the services that are in the "additional services category" of the service that is already in the cart.