ledger: mention "bitcoin" app when update is needed

plugins/ledger/ledger.py

@@ -25,6 +25,12 @@ try:
 except ImportError:
     BTCHIP = False
 
+MSG_NEEDS_FW_UPDATE_GENERIC = _('Firmware version too old. Please update at') + \
+                      ' https://www.ledgerwallet.com'
+MSG_NEEDS_FW_UPDATE_SEGWIT = _('Firmware version (or "Bitcoin" app) too old for Segwit support. Please update at') + \
+                      ' https://www.ledgerwallet.com'
+
+
 class Ledger_Client():
     def __init__(self, hidDevice):
         self.dongleObject = btchip(hidDevice)
@@ -57,9 +63,9 @@ class Ledger_Client():
         #self.get_client() # prompt for the PIN before displaying the dialog if necessary
         #self.handler.show_message("Computing master public key")
         if xtype in ['p2wpkh', 'p2wsh'] and not self.supports_native_segwit():
-            raise Exception("Firmware version too old for Segwit support. Please update at https://www.ledgerwallet.com")
+            raise Exception(MSG_NEEDS_FW_UPDATE_SEGWIT)
         if xtype in ['p2wpkh-p2sh', 'p2wsh-p2sh'] and not self.supports_segwit():
-            raise Exception("Firmware version too old for Segwit support. Please update at https://www.ledgerwallet.com")
+            raise Exception(MSG_NEEDS_FW_UPDATE_SEGWIT)
         splitPath = bip32_path.split('/')
         if splitPath[0] == 'm':
             splitPath = splitPath[1:]
@@ -119,7 +125,7 @@ class Ledger_Client():
 
             if not checkFirmware(firmware):
                 self.dongleObject.dongle.close()
-                raise Exception("HW1 firmware version too old. Please update at https://www.ledgerwallet.com")
+                raise Exception(MSG_NEEDS_FW_UPDATE_GENERIC)
             try:
                 self.dongleObject.getOperationMode()
             except BTChipException as e:
@@ -285,12 +291,12 @@ class Ledger_KeyStore(Hardware_KeyStore):
 
             if txin['type'] in ['p2wpkh-p2sh', 'p2wsh-p2sh']:
                 if not self.get_client_electrum().supports_segwit():
-                    self.give_error("Firmware version too old to support segwit. Please update at https://www.ledgerwallet.com")
+                    self.give_error(MSG_NEEDS_FW_UPDATE_SEGWIT)
                 segwitTransaction = True
 
             if txin['type'] in ['p2wpkh', 'p2wsh']:
                 if not self.get_client_electrum().supports_native_segwit():
-                    self.give_error("Firmware version too old to support native segwit. Please update at https://www.ledgerwallet.com")
+                    self.give_error(MSG_NEEDS_FW_UPDATE_SEGWIT)
                 segwitTransaction = True
 
             pubkeys, x_pubkeys = tx.get_sorted_pubkeys(txin)