Issue 1216: Improved unit scrolling by moving one line or one character depending on direction.  This does not take into consideration portions of text that use a different font and/or font size than the one specified for the JXEdtiorPane.
Issue 1216: Improved unit scrolling by moving one line or one character depending on direction.  This does not take into consideration portions of text that use a different font and/or font size than the one specified for the JXEdtiorPane.

git-svn-id: 9c6ef37dfd7eaa5a3748af7ba0f8d9e7b67c2a4c@3686 1312f61e-266d-0410-97fa-c3b71232c9ac

krichter722/swingx,krichter722/swingx,trejkaz/swingx,tmyroadctfig/swingx,trejkaz/swingx