Use ltub for litecoin by default instead of xprv

Introduced when upgrading from bitcoinjs-lib v3.3.0

src/index.html

@@ -277,7 +277,7 @@
                             <label for="litecoin-use-ltub" class="col-sm-2 control-label">Prefixes</label>
                             <div class="col-sm-10 checkbox">
                                 <label>
-                                    <input type="checkbox" id="litecoin-use-ltub" class="litecoin-use-ltub">
+                                    <input type="checkbox" id="litecoin-use-ltub" class="litecoin-use-ltub" checked="checked">
                                     Use <code>Ltpv / Ltub</code> instead of <code>xprv / xpub</code>
                                 </label>
                             </div>

src/js/bitcoinjs-extensions.js

@@ -316,3 +316,14 @@ bitcoinjs.bitcoin.networks.litecoinBip49 = {
     scriptHash: 0x32,
     wif: 0xb0
 };
+
+bitcoinjs.bitcoin.networks.litecoinXprv = {
+    messagePrefix: '\x19Litecoin Signed Message:\n',
+    bip32: {
+      public: 0x0488b21e,
+      private: 0x0488ade4,
+    },
+    pubKeyHash: 0x30,
+    scriptHash: 0x32,
+    wif: 0xb0
+};

src/js/index.js

@@ -14,7 +14,7 @@
     var showPubKey = true;
     var showPrivKey = true;
     var showQr = false;
-    var litecoinUseLtub = false;
+    var litecoinUseLtub = true;
 
     var entropyChangeTimeoutEvent = null;
     var phraseChangeTimeoutEvent = null;
@@ -318,10 +318,10 @@
     function litecoinUseLtubChanged() {
         litecoinUseLtub = DOM.litecoinUseLtub.prop("checked");
         if (litecoinUseLtub) {
-            network = bitcoinjs.bitcoin.networks.litecoinLtub;
+            network = bitcoinjs.bitcoin.networks.litecoin;
         }
         else {
-            network = bitcoinjs.bitcoin.networks.litecoin;
+            network = bitcoinjs.bitcoin.networks.litecoinXprv;
         }
         phraseChanged();
     }