Banner slider full screen

[Leonardo Matos]

Is your feature request related to a problem? Please describe.
Users frequently what slider with full (or almost full with bigger max-width) screen width:

Describe the solution you'd like
banner-slider section should have a config option to set banners full screen.

https://github.com/ecomplus/storefront/blob/master/%40ecomplus/storefront-template/template/pages/%40/sections/banner-slider.ejs

https://github.com/ecomplus/storefront/blob/master/%40ecomplus/storefront-template/template/js/netlify-cms/base-config/sections.js#L97-L135

Describe alternatives you've considered
N/A

Additional context
Related to new Beauty.ECom theme:
https://xd.adobe.com/view/a6ede39e-9ce6-4cf7-aa10-f5cbea3d2c49-f3be/screen/b263e48d-cf5a-422c-83b9-756b79572378?fullscreen