Handle canceled folder selection

main.js

@@ -247,6 +247,9 @@ ipcMain.on('browseFolder', (event, args) => {
 			    properties:["openDirectory"]}
 			 ).then(result => {
 			     console.log(result)
+			     if (result.canceled || result.filePaths.length === 0) {
+				 return;
+			     }
 			     setImmediate(function() {
 				 var focusedWindow = BrowserWindow.getFocusedWindow();
 				 focusedWindow.webContents.send('browseFolder',result.filePaths);