Add conditional kovan logic to etherscan link generators.

ui/lib/account-link.js

@@ -1,7 +1,6 @@
 module.exports = function (address, network) {
   const net = parseInt(network)
   let link
-
   switch (net) {
     case 1: // main net
       link = `http://etherscan.io/address/${address}`
@@ -12,6 +11,9 @@ module.exports = function (address, network) {
     case 3: // ropsten test net
       link = `http://testnet.etherscan.io/address/${address}`
       break
+    case 42: // kovan test net
+      link = `http://kovan.etherscan.io/address/${address}`
+      break
     default:
       link = ''
       break

ui/lib/explorer-link.js

@@ -5,9 +5,12 @@ module.exports = function (hash, network) {
     case 1: // main net
       prefix = ''
       break
-    case 3: // morden test net
+    case 3: // ropsten test net
       prefix = 'testnet.'
       break
+    case 42: // kovan test net
+      prefix = 'kovan.'
+      break
     default:
       prefix = ''
   }