Move porn expensing

Small change, and debatable.

In master currently, porn is simply listed as one of the expenses of a slave, like food. There's advantages to looking at it that way.

However, I kind of like seeing it weighed directly on the porn budget line, which currently never ever show expenses. The expense will still be directly attributed to the slave with this mr, but it will no longer be a forecasted part of their expenses if you interact with them. Aside from seeing the literal line item where you choose what you are spending on their porn career, that is. Makes sense to me.

Edit: if desired, I could easily tie the report into the text that already appears here a few lines earlier to show a kind of net result as well.