BUG FIX:  HideOnClose=true for document content cause repaint problem:  https://sourceforge.net/forum/message.php?msg_id=4397944
BUG FIX:  HideOnClose=true for document content cause repaint problem:  https://sourceforge.net/forum/message.php?msg_id=4397944

git-svn-id: dea0e26cebe12643f3180c2c69384aa256c684b6@38 764a741f-c628-0410-a7dc-abe640748d39

yolanother/DockPanelSuite