Users don't know about our utility classes

[timpaul]

What

For example, we have classes for hiding things from the screen (and we'll soon have one for hiding things from print).

Dave House created a prototype that included this information.

Hanna created a list of undocumented parts of GOV.UK Frontend

Why

Without this information, designers and developers will end up recreating these styles from scratch.

Who needs to know

@StephenGill , @christopherthomasdesign

[timpaul]

This came up again today on support - a user knew there was a class for hiding things from the screen, but didn't know what it was.

[querkmachine]

It seems like there's been some progress on this since it was opened, with most utility and override classes now being documented somewhere in the Design System, with govuk-clearfix being the only standout remaining.

For now, however, this issue seems like it's been superceded by #2739 and the discussions taking place there, so I'm gonna close this one off.