riot-desktop open SSO in browser so user doesn't have to auth twice

src/electron-main.js

@@ -35,6 +35,7 @@ const tray = require('./tray');
 const vectorMenu = require('./vectormenu');
 const webContentsHandler = require('./webcontents-handler');
 const updater = require('./updater');
+const protocolInit = require('./protocol');
 
 const windowStateKeeper = require('electron-window-state');
 const Store = require('electron-store');
@@ -511,6 +512,9 @@ if (!gotLock) {
     app.exit();
 }
 
+// do this after we know we are the primary instance of the app
+protocolInit();
+
 // Register the scheme the app is served from as 'standard'
 // which allows things like relative URLs and IndexedDB to
 // work.