Extend grid - support s0, m0, l0

[Tomucha]

... which is basically display: none;

Genius!

[Tomucha]

A dej tam podporu pro totok pls. To je abys mohl prvek v gridu uplne schovat.

[Tomucha]

De-facto to bude uplen stejny jako:
https://github.com/fnx-io/fnx_ui/blob/master/stylesheet/src/css/_style/responsivity.less