Add network

Based on https://github.com/rsksmart/RSKIPs/blob/master/IPs/RSKIP57.md

src/js/index.js

@@ -2947,6 +2947,20 @@
                 setHdCoin(175);
             },
         },
+        {
+            name: "RBTC - RSK",
+            onSelect: function() {
+                network = libs.bitcoin.networks.rubycoin;
+                setHdCoin(137);
+            },
+        },
+        {
+            name: "tRBTC - RSK Testnet",
+            onSelect: function() {
+                network = libs.bitcoin.networks.rubycoin;
+                setHdCoin(37310);
+            },
+        },
         {
             name: "RBY - Rubycoin",
             onSelect: function() {