we don't need to immediately re-order objects when setting the
Z-order, just set the dirty flag and we can calculate the proper order
layout.
This takes the time for the chart to appear from multiple minutes
to 20sec for me.
Change-Id: If80569da09469423f19f9fe82b40dfbdac14f161
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/121806
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>
Noel Grandin
a9cd44f8de