add none option for connection viwe

add key type picker

ShhShell/Keys/KeyType.swift

@@ -7,7 +7,7 @@
 
 import Foundation
 
-enum KeyType: Codable, Equatable, Hashable, CustomStringConvertible {
+enum KeyType: Codable, Equatable, Hashable, CustomStringConvertible, CaseIterable {
 	case ed25519
 	case rsa
 	

ShhShell/Views/Hosts/ConnectionView.swift

@@ -80,9 +80,11 @@ struct ConnectionView: View {
 					TextBox(label: "Password", text: $handler.host.password, prompt: "not required if using publickeys", secure: true)
 					
 					Picker("Private key", selection: $handler.host.privateKeyID) {
+						Text("None")
+							.tag(nil as UUID?)
 						ForEach(keyManager.keypairs) { keypair in
 							Text(keypair.label)
-								.tag(keypair.id)
+								.tag(keypair.id as UUID?)
 						}
 					}
 					

ShhShell/Views/Keys/KeyImporterView.swift

@@ -23,12 +23,22 @@ struct KeyImporterView: View {
     var body: some View {
 		List {
 			TextBox(label: "Name", text: $keyName, prompt: "A name for your key")
+			
+			Picker("Key type", selection: $keyType) {
+				ForEach(KeyType.allCases, id: \.self) { type in
+					Text(type.description)
+						.tag(type)
+				}
+			}
+			.pickerStyle(SegmentedPickerStyle())
+			
 			HStack {
 				Text("Private Key")
 				Spacer()
 				Text("Required")
 					.foregroundStyle(.red)
 			}
+			
 			TextEditor(text: $privkeyStr)
 			
 			TextEditor(text: .constant(keypair.openSshPubkey))