The idea is to implement the ability to change both box height and body font size for dropdown quick filters and parameter controls when they are inactive.
Currently, formatting the body font size for an dropdown interface does not change the size for the inactive view, but only for the active dropped-down menu itself. The issue is discussed as a question here.
The technical limitation seems to be that if the font size is changed in the inactive view, the vertical height of the box must change with it; this is why the idea is to implement the ability to change both box height and font size.
An official "workaround" is discussed here (I put that in quotes because it isn't a very useful workaround).