Storefront: Add a 3rd layout button

TODAY

Button #1:

Displays 4 columns on desktop (3 on ipad, 1 on mobile). And 4 wider columns if we hide the filter bar.

Button #2:

Displays a list instead of columns, however the list is in 2 columns on desktop (2 on ipad, 1 on mobile).

NEW

Button #1 should display 5 columns on desktop, 4 on ipad, 2 on mobile

Button #2 should display almost the same as button #1 today = 4 columns on desktop, 3 on ipad, 1 on mobile

Button #3 (list-mode) should display the same as today

Displays a list instead of columns, however the list is in 2 columns on desktop (2 on ipad, 1 on mobile).