Grid options: Labels for columns

[MarDiehl]

Link to the documentation you'd like to improve

https://sphinx-panels.readthedocs.io/en/latest/

What to improve

The default class is given as col-lg-6 col-md-6 col-sm-6 col-xs-12. According to the original bootstrap documentation , col-xs does not exist and col- should be used for small devices. Additionally, there is col-xl

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[chrisjsewell]

Heya see #67, I suggest checking out https://sphinx-design.readthedocs.io/en/furo-theme/grids.html