Bug CODE-1580 Font doesn't look good
・Renamed font size method to look like HTML font relative size.
・Fixed sizes to be more like before in Nimbus while not breaking in other L&F (tested as far as I can).
Issue#: CODE-1580

git-svn-id: svn+ssh://svn.code.sf.net/p/pcgen/code/Trunk@21084 ef53c05b-3124-4d59-ae7d-fe3273f42be7