updated docs, small improvement of recent RPC rendering

app/scripts/controllers/preferences.js

@@ -322,7 +322,7 @@ class PreferencesController {
 
   /**
    * Returns an updated rpcList based on the passed url and the current list.
-   * The returned list will have a max length of 2. If the _url currently exists it the list, it will be moved to the
+   * The returned list will have a max length of 3. If the _url currently exists it the list, it will be moved to the
    * end of the list. The current list is modified and returned as a promise.
    *
    * @param {string} _url The rpc url to add to the frequentRpcList.

old-ui/app/components/app-bar.js

@@ -352,8 +352,9 @@ module.exports = class AppBar extends Component {
 
   renderCommonRpc (rpcList, provider) {
     const {dispatch} = this.props
+    const reversedRpcList = rpcList.slice().reverse()
 
-    return rpcList.map((rpc) => {
+    return reversedRpcList.map((rpc) => {
       const currentRpcTarget = provider.type === 'rpc' && rpc === provider.rpcTarget
 
       if ((rpc === LOCALHOST_RPC_URL) || currentRpcTarget) {

ui/app/components/dropdowns/network-dropdown.js

@@ -272,8 +272,9 @@ NetworkDropdown.prototype.getNetworkName = function () {
 
 NetworkDropdown.prototype.renderCommonRpc = function (rpcList, provider) {
   const props = this.props
+  const reversedRpcList = rpcList.slice().reverse()
 
-  return rpcList.map((rpc) => {
+  return reversedRpcList.map((rpc) => {
     const currentRpcTarget = provider.type === 'rpc' && rpc === provider.rpcTarget
 
     if ((rpc === 'http://localhost:8545') || currentRpcTarget) {
@@ -302,7 +303,7 @@ NetworkDropdown.prototype.renderCommonRpc = function (rpcList, provider) {
         ]
       )
     }
-  }).reverse()
+  })
 }
 
 NetworkDropdown.prototype.renderCustomOption = function (provider) {