Update responsive navbar padding to use variables

[wojtask9]

Currently .nabvar-expand-* classes adds padding to .nav-link wrapped by media-breakpoint-up
https://github.com/twbs/bootstrap/blob/v4-dev/scss/_navbar.scss#L168-L171

This should be moved few lines above to media-breakpoint-down https://github.com/twbs/bootstrap/blob/v4-dev/scss/_navbar.scss#L143

It would be great if those paddings were variables.

EDIT:
should be moved to media-breakpoint-down

[mdo]

Without a screenshot or demo of what you're running into, I can't help more. The paddings have been built this way by design. Agreed though we need variables there.

[wojtask9]

If you plan to make variables then moving to media-breakpoint-down is not necessary

[mdo]

I believe this was closed by #25117.