When selling, don't show equivalent pricing in USD at all (was shown as 0) if ETH pricing is not available

Trust/Sell/ViewControllers/EnterSellTicketsPriceQuantityViewController.swift

@@ -275,6 +275,7 @@ class EnterSellTicketsPriceQuantityViewController: UIViewController {
         dollarCostLabelLabel.textColor = viewModel.dollarCostLabelLabelColor
         dollarCostLabelLabel.font = viewModel.dollarCostLabelLabelFont
         dollarCostLabelLabel.text = R.string.localizable.aWalletTicketTokenSellDollarCostLabelTitle()
+        dollarCostLabelLabel.isHidden = viewModel.hideDollarCost
 
         dollarCostLabel.textAlignment = .center
         dollarCostLabel.textColor = viewModel.dollarCostLabelColor
@@ -282,6 +283,7 @@ class EnterSellTicketsPriceQuantityViewController: UIViewController {
         dollarCostLabel.text = viewModel.dollarCostLabelText
         dollarCostLabel.backgroundColor = viewModel.dollarCostLabelBackgroundColor
         dollarCostLabel.layer.masksToBounds = true
+        dollarCostLabel.isHidden = viewModel.hideDollarCost
 
         quantityLabel.textAlignment = .center
         quantityLabel.textColor = viewModel.choiceLabelColor

Trust/Sell/ViewModels/EnterSellTicketsPriceQuantityViewControllerViewModel.swift

@@ -137,6 +137,10 @@ struct EnterSellTicketsPriceQuantityViewControllerViewModel {
         return UIColor(red: 236, green: 236, blue: 236)
     }
 
+    var hideDollarCost: Bool {
+        return dollarCost.trimmed.isEmpty
+    }
+
     init(ticketHolder: TicketHolder) {
         self.ticketHolder = ticketHolder
     }