cardano: SignTransaction -> SignTx to match other coins

protob/messages-cardano.proto

@@ -86,7 +86,7 @@ message CardanoVerifyMessage {
  * @next CardanoTxRequest
  * @next Failure
  */
-message CardanoSignTransaction {
+message CardanoSignTx {
     repeated CardanoTxInputType inputs = 1;     // inputs to be used in transaction
     repeated CardanoTxOutputType outputs = 2;   // outputs to be used in transaction
     optional uint32 transactions_count = 3;     // transactions count

protob/messages.proto

@@ -165,7 +165,7 @@ enum MessageType {
     MessageType_CardanoSignMessage = 300 [(wire_in) = true];
     MessageType_CardanoMessageSignature = 301 [(wire_out) = true];
     MessageType_CardanoVerifyMessage = 302 [(wire_in) = true];
-    MessageType_CardanoSignTransaction = 303 [(wire_in) = true];
+    MessageType_CardanoSignTx = 303 [(wire_in) = true];
     MessageType_CardanoTxRequest = 304 [(wire_out) = true];
     MessageType_CardanoGetPublicKey = 305 [(wire_in) = true];
     MessageType_CardanoPublicKey = 306 [(wire_out) = true];