Is this tested on the native LookAndFeel of Linux, Mac and Windows?
Generally, I like to avoid messing with text spacing too much, as it has the tendency to screw upon some LookAndFeels or some versions of it, which results in some text is not entirely readable on some platforms.
That being said, we do fix the LookAndFeel, because NurseRostering already screws up on Mac, but the intent is to fix this sooner or later... :)