nozaps: switch to global sheet when zapping

This fixes many popping bugs

Changelog-Fixed: Fix zap sheet popping

damus/Models/Zaps/CustomizeZapModel.swift

@@ -15,7 +15,6 @@ class CustomizeZapModel: ObservableObject {
     @Published var zap_type: ZapType = .pub
     @Published var invoice: String = ""
     @Published var error: String? = nil
-    @Published var showing_wallet_selector: Bool = false
     @Published var zapping: Bool = false
     @Published var show_zap_types: Bool = false