fix alert msg in remix-alpha

src/app.js

@@ -210,8 +210,8 @@ function run () {
 
   if (window.location.hostname === 'yann300.github.io') {
     modalDialogCustom.alert('This UNSTABLE ALPHA branch of Remix has been moved to http://ethereum.github.io/remix-live-alpha.')
-  } else if (window.location.hostname === 'ethereum.github.io' &&
+  } else if (window.location.hostname === 'remix-alpha.ethereum.org' ||
-  window.location.pathname.indexOf('/remix-live-alpha') === 0) {
+  (window.location.hostname === 'ethereum.github.io' && window.location.pathname.indexOf('/remix-live-alpha') === 0)) {
     modalDialogCustom.alert(`This instance of the Remix IDE is an UNSTABLE ALPHA branch.\n
 Please only use it if you know what you are doing, otherwise visit the stable version at http://remix.ethereum.org.`)
   } else if (window.location.protocol.indexOf('http') === 0 &&