added isValid flag

git-svn-id: svn://svn.jdownloader.org/jdownloader/trunk@22491 ebf7c1c2-ba36-0410-9fe8-c592906822b4
Host: Fshare.vn - Calculate exact wait time (feel free to refert if ...)
http://board.jdownloader.org/showthread.php?t=50901

git-svn-id: svn://svn.jdownloader.org/jdownloader/trunk@22492 ebf7c1c2-ba36-0410-9fe8-c592906822b4
Updated Deutsch Translation

git-svn-id: svn://svn.jdownloader.org/jdownloader/trunk@22493 ebf7c1c2-ba36-0410-9fe8-c592906822b4