small refactor: define/use a constant to clarify its usage

git-svn-id: https://svn.apache.org/repos/asf/pivot/trunk@1623361 13f79535-47bb-0310-9956-ffa450edef68
PIVOT-958, updated sample files to align with new font (main changes on the new font chosen still has to be committed)

git-svn-id: https://svn.apache.org/repos/asf/pivot/trunk@1623362 13f79535-47bb-0310-9956-ffa450edef68