Update etherscan links to https

Fixes #2005

ui/lib/account-link.js

@@ -3,19 +3,19 @@ module.exports = function (address, network) {
   let link
   switch (net) {
     case 1: // main net
-      link = `http://etherscan.io/address/${address}`
+      link = `https://etherscan.io/address/${address}`
       break
     case 2: // morden test net
-      link = `http://morden.etherscan.io/address/${address}`
+      link = `https://morden.etherscan.io/address/${address}`
       break
     case 3: // ropsten test net
-      link = `http://ropsten.etherscan.io/address/${address}`
+      link = `https://ropsten.etherscan.io/address/${address}`
       break
     case 4: // rinkeby test net
-      link = `http://rinkeby.etherscan.io/address/${address}`
+      link = `https://rinkeby.etherscan.io/address/${address}`
       break
     case 42: // kovan test net
-      link = `http://kovan.etherscan.io/address/${address}`
+      link = `https://kovan.etherscan.io/address/${address}`
       break
     default:
       link = ''