Fix ClassCastException in Portfolio History screen

[ghost]

Exception in Portfolio History view because wasMyOffer(tradable) is being used to check if the list item is an offer or trade.

---

To reproduce the problem: your portfolio history contains a canceled offer that was made with a different onion address. This can be quite common if you have changed your onion address (see #5035 and #3995)

Mar-25 17:29:39.270 [JavaFX Application Thread] ERROR bisq.common.setup.CommonSetup: Uncaught Exception from thread JavaFX Application Thread 
Mar-25 17:29:39.270 [JavaFX Application Thread] ERROR bisq.common.setup.CommonSetup: throwableMessage= bisq.core.offer.OpenOffer cannot be cast to bisq.core.trade.Trade 
Mar-25 17:29:39.270 [JavaFX Application Thread] ERROR bisq.common.setup.CommonSetup: throwableClass= class java.lang.ClassCastException 
Mar-25 17:29:39.272 [JavaFX Application Thread] ERROR bisq.common.setup.CommonSetup: Stack trace:
java.lang.ClassCastException: bisq.core.offer.OpenOffer cannot be cast to bisq.core.trade.Trade
    at bisq.desktop.main.portfolio.closedtrades.ClosedTradesViewModel.getTradeFee(ClosedTradesViewModel.java:177)
    at bisq.desktop.main.portfolio.closedtrades.ClosedTradesView$12$1.updateItem(ClosedTradesView.java:678)
    at bisq.desktop.main.portfolio.closedtrades.ClosedTradesView$12$1.updateItem(ClosedTradesView.java:674)
    at javafx.scene.control.TableCell.updateItem(TableCell.java:665)

[ripcurlx]

utACK