Allow the next occurrence of a repeating expense to be added early

There should be an 'Add Next Occurrence' button on a repeating expense to add the next occurrence to the expenses log.

There are three use cases for this:

1. I want to pay the next occurrence of a recurring expense earlier than it is scheduled for, and I want to record this payment in LV.
2. I want to schedule a payment with my bank for the next occurrence of a recurring expense that is automatically paid but via a different method to that configured (just this once), and I want to record this payment in LV now so I don't have to remember to do it later.
3. I want to schedule a payment with my bank for the next occurrence of a recurring expense that is not automatically paid, and I want to record this payment in LV now so I don't have to remember to do it later.