Add delay when typing customer or product names

When entering a customer or product name, there is no delay between each character, this makes many unnecessary requests to the server and the results are received in the wrong order.

Before sending the request, there must be a delay (300 ~ 500ms), and if another key is pressed before the delay, the request must be suppressed.

I hope you can understand, I'm using google translator.


Problem example :

https://pasteboard.co/K20dN6G.jpg