UI: iOS: disable list rows when no config

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>

Sources/WireGuardApp/UI/iOS/View/TunnelListCell.swift

@@ -159,6 +159,10 @@ class TunnelListCell: UITableViewCell {
             statusSwitch.isUserInteractionEnabled = (status == .inactive || status == .active)
         }
 
+        if tunnel.tunnelConfiguration == nil {
+            statusSwitch.isUserInteractionEnabled = false
+            backgroundColor = .systemPink
+        }
     }
 
     private func reset(animated: Bool) {