bug 449051: Swing: BasicDocumentFilter does not truncate too long values
correctly in UI 
https://bugs.eclipse.org/bugs/show_bug.cgi?id=449051

Change-Id: I36d987f3bc76c838980c0198ed947b2cec2c4b91
Signed-off-by: Judith Gull <jgu@bsiag.com>
Reviewed-on: https://git.eclipse.org/r/35679
Tested-by: Hudson CI
Reviewed-by: Matthias Villiger <mvi@bsiag.com>