make electron send email validation URLs with a nextlink of riot.im rather than file:///

src/vector/index.js

@@ -136,12 +136,21 @@ var onNewScreen = function(screen) {
 // click back to the client having registered.
 // It's up to us to recognise if we're loaded with
 // this URL and tell MatrixClient to resume registration.
+//
+// If we're in electron, we should never pass through a file:// URL otherwise
+// the identity server will try to 302 the browser to it, which breaks horribly.
+// so in that instance, hardcode to use riot.im/app for now instead.
 var makeRegistrationUrl = function() {
+    if (window.location.protocol === "file:") {
+        return 'https://riot.im/app/#/register';
+    }
+    else {
         return window.location.protocol + '//' +
                window.location.host +
                window.location.pathname +
                '#/register';
     }
+}
 
 window.addEventListener('hashchange', onHashChange);