simplified window icon file type selection

electron/main.js

@@ -138,16 +138,11 @@ function handleSquirrelEvent() {
 let mainWindow;
 let isQuitting = false;
 
-let iconPath = __dirname + '/../resources/Icon.ico';
-if (process.platform === 'linux') {
-    iconPath = __dirname + '/../resources/Icon.png';
-}
-
 function createWindow () {
 	// Create the browser window using the state information
 	mainWindow = new BrowserWindow({
 		 title: 'Rambox'
-		,icon: iconPath
+		,icon: __dirname + '/../resources/Icon.' + (process.platform === 'linux' ? 'png' : 'ico')
 		,backgroundColor: '#FFF'
 		,x: config.get('x')
 		,y: config.get('y')