"Holiday" Category for Sweet Suite store

There are a number of holiday-themed furniture sets sold there (shamrock, halloween, valentine’s), but they can’t be searched for without either going through the massive “all items” list or finding individual furniture pieces in the different chair/table/etc. categories. Since they don’t really fit (aesthetic-wise) into non-holiday condo decoration anyways, it would make sense to include them into a separate category.

This is now in the next update.