Improvement of the quantity field

Hi there!
Nice plugin!

It would be convenient to be able to move between product quantity fields by pressing Tab button, so that the selection focus does not go to product names and checkboxes.
And if in the initial state the quantity fields were set to 0, and after increasing the value by pressing the up arrow button, the checkbox would be checked automatically, it would be possible to fill the cart very quickly, operating with only two buttons.

And for those who like to work with the mouse, you can make + and – buttons, as it’s implemented here: https://demo.creativethemes.com/blocksy/homi/product/daily-chair/

By the way, I did the translation into Russian.

The page I need help with: [log in to see the link]