Update testnet detection (#4746)

js/src/dapps/registry/actions.js

@@ -37,10 +37,11 @@ export const setIsTestnet = (isTestnet) => ({ type: 'set isTestnet', isTestnet }
 export const fetchIsTestnet = () => (dispatch) =>
   api.net.version()
     .then((netVersion) => {
-      dispatch(setIsTestnet(
-        netVersion === '2' || // morden
-        netVersion === '3' // ropsten
-      ));
+      dispatch(setIsTestnet([
+        '2', // morden
+        '3', // ropsten
+        '42' // kovan
+      ].includes(netVersion)));
     })
     .catch((err) => {
       console.error('could not check if testnet');

js/src/dapps/tokendeploy/services.js

@@ -122,7 +122,7 @@ export function attachInstances () {
     .then(([registryAddress, netChain]) => {
       const registry = api.newContract(abis.registry, registryAddress).instance;
 
-      isTest = ['morden', 'ropsten', 'testnet'].includes(netChain);
+      isTest = ['kovan', 'morden', 'ropsten', 'testnet'].includes(netChain);
 
       console.log(`contract was found at registry=${registryAddress}`);
       console.log(`running on ${netChain}, isTest=${isTest}`);

js/src/redux/providers/status.js

@@ -290,9 +290,11 @@ export default class Status {
       .then(([
         netPeers, clientVersion, netVersion, defaultExtraData, netChain, netPort, rpcSettings, enode, upgradeStatus
       ]) => {
-        const isTest =
-          netVersion === '2' || // morden
-          netVersion === '3'; // ropsten
+        const isTest = [
+          '2', // morden
+          '3', // ropsten
+          '42' // kovan
+        ].includes(netVersion);
 
         const longStatus = {
           netPeers,