[FIX] some czech translation fixes

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/12.x@50534 b456876b-0849-0410-b77d-98878d47e9d5
[FIX]Add missing command to create the 7z tarballs that otherwise need to be created by hand elsewhere. This assumes that p7zip is installed server side. For desktops/laptops and such, see http://www.7-zip.org

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/12.x@50535 b456876b-0849-0410-b77d-98878d47e9d5
[FIX] When updating tracker item via profile, do not replace fields that are not specified


git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/12.x@50537 b456876b-0849-0410-b77d-98878d47e9d5