Useful function for previewing tracks in browser

I would like to suggest one useful function for pre-listening in the browser. To do sync BPM preview and master deck - this would easily choose the next track during the performance

also I like proposal from this post, where it is proposed to add the ability to listen to tracks using a button on the controller, and fortunately this can be easily implemented

https://forums.pioneerdj.com/hc/en-us/community/posts/203212883-In-the-Browser-tracks-can-be-clicked-to-prelisten-can-this-be-done-on-the-controller-without-having-to-use-the-mouse-?input_string=Useful%20function%20for%20previewing%20tracks%20in%20your%20browser

It is clear that all controllers are different, so you can add MIDI mapping for pre-listen and each assign himself a button to listen without using the mouse
http://prntscr.com/p2hr48

Thanks.