this class appears to be not in use in anymore

[cdmo]

Small potatoes, but this appears to be a small bit of extra code that might be worth removing

[cbeer]

I think this may be intended as an extension point for downstream applications to use to provide styling or other behaviors.

[cdmo]

I guess I was thinking it was a bit odd that this one element has a class attached, but others don't have extra classes with no style attached. The rest of the codebase seems to assume you'll override the view (or add classes through a helper method like LayoutHelper::sidebar_classes). The naming convention of the class is a bit odd too compared to all the other classes/ids I've encountered so far. Just seemed like a thing that got missed, but if it's needed/wanted, of course just close the PR. Thanks.