allow watch keystores to enable signing from connected hardware wallets

src/main/java/com/sparrowwallet/sparrow/io/CaravanMultisig.java

@@ -54,6 +54,11 @@ public class CaravanMultisig implements WalletImport, WalletExport {
 
             for(ExtPublicKey extKey : cf.extendedPublicKeys) {
                 Keystore keystore = new Keystore(extKey.name.length() > Keystore.MAX_LABEL_LENGTH ? extKey.name.substring(0, Keystore.MAX_LABEL_LENGTH) : extKey.name);
+
+                if("Unknown".equals(extKey.bip32Path)) {
+                    extKey.bip32Path = "m/45'/0/0/0";
+                }
+
                 try {
                     keystore.setKeyDerivation(new KeyDerivation(extKey.xfp, extKey.bip32Path));
                 } catch(NumberFormatException e) {

src/main/java/com/sparrowwallet/sparrow/transaction/HeadersController.java

@@ -740,7 +740,7 @@ public class HeadersController extends TransactionFormController implements Init
 
     private void initializeSignButton(Wallet signingWallet) {
         Optional<Keystore> softwareKeystore = signingWallet.getKeystores().stream().filter(keystore -> keystore.getSource().equals(KeystoreSource.SW_SEED)).findAny();
-        Optional<Keystore> usbKeystore = signingWallet.getKeystores().stream().filter(keystore -> keystore.getSource().equals(KeystoreSource.HW_USB)).findAny();
+        Optional<Keystore> usbKeystore = signingWallet.getKeystores().stream().filter(keystore -> keystore.getSource().equals(KeystoreSource.HW_USB) || keystore.getSource().equals(KeystoreSource.SW_WATCH)).findAny();
         Optional<Keystore> bip47Keystore = signingWallet.getKeystores().stream().filter(keystore -> keystore.getSource().equals(KeystoreSource.SW_PAYMENT_CODE)).findAny();
         if(softwareKeystore.isEmpty() && usbKeystore.isEmpty() && bip47Keystore.isEmpty()) {
             signButton.setDisable(true);
@@ -977,7 +977,7 @@ public class HeadersController extends TransactionFormController implements Init
 
         List<String> fingerprints = headersForm.getSigningWallet().getKeystores().stream().map(keystore -> keystore.getKeyDerivation().getMasterFingerprint()).collect(Collectors.toList());
         List<Device> signingDevices = AppServices.getDevices().stream().filter(device -> fingerprints.contains(device.getFingerprint())).collect(Collectors.toList());
-        if(signingDevices.isEmpty() && headersForm.getSigningWallet().getKeystores().stream().noneMatch(keystore -> keystore.getSource().equals(KeystoreSource.HW_USB))) {
+        if(signingDevices.isEmpty() && headersForm.getSigningWallet().getKeystores().stream().noneMatch(keystore -> keystore.getSource().equals(KeystoreSource.HW_USB) || keystore.getSource().equals(KeystoreSource.SW_WATCH))) {
             return;
         }