Thank you for your questions. If you want to hide the Fields List by default, you can set
"configuratorActive": false, when initializing the component. In case you need to hide the Fields List in runtime, please use the setOptions() method. Here is a jsFiddle example of how it can be done – https://jsfiddle.net/flexmonster/g8ps0kf1/.
Please let us know if everything works fine for you.