Picking: reuse LayerFilterJob to perform layer filtering
This fixes picking for cases where multiple LayerFilters using different filter modes are present in the FrameGraph. This also reduces code duplication.
Change-Id: I19d0c2c5777930820ab950cbf2bfe08ef7d2484f Reviewed-by: Mike Krus mike.krus@kdab.com (cherry picked from commit 406ea413) Reviewed-by: Paul Lemire paul.lemire@kdab.com