added selection by lab tests to PCR worklists; reinstated collapsing multiple requests in PCR worklist (retained split on specimen); bugfix to PCR status - only require new, not everything < complete; force CHIM DNA extraction requests to 3 rows}
git-svn-id: https://jti.org.uk/svn/hmds_lims/trunk@1869 4177bd82-f056-0410-812d-caef170e3fa0
