fix crash when opensshpubkey cant be made

fix expand button not enabled sometimes

ShhShell/Keys/Keypair.swift

@@ -52,7 +52,12 @@ struct Keypair: KeypairProtocol {
 	}
 	
 	var base64Pubkey: String {
-		String(openSshPubkey.split(separator: " ")[1])
+		let split = openSshPubkey.split(separator: " ")
+		if split.count >= 2 {
+			return String(split[1])
+		} else {
+			return "Error creating OpenSSH Publickey"
+		}
 	}
 	
 	var base64Privkey: String {

ShhShell/Views/Hosts/RecentsView.swift

@@ -98,7 +98,7 @@ struct RecentsView: View {
 							.foregroundStyle(hostsManager.tint)
 					}
 					.buttonStyle(.plain)
-					.disabled(historyLimit != 0)
+					.disabled(historyLimit >= hostsManager.history.count)
 					.padding(.trailing, 10)
 					
 					Button {