For Review - don't merge

Think about moving this `current_user` logic up into the non-partial views (expense index and wishlist show). Then move this partial into a "shared" folder (since both expense and wishlist uses it), but also split this partial up into two different partials: `_user_expense_table` and `_public_expense_table`. Your `_user_expense_table` would be the format if you were logged in and the `_public_expense_table` would be if no one is logged in. Any repetition between the two could be factored out further into their own partials.