Charts now get a temporary colored applied to the area property set if
their color was set to automatic, which is done by default in tiled
rendering mode.
Change-Id: Ic6bd19b97d2a0ffa2a1ad516cfa202e2f4921db7
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/160659
Tested-by: Jenkins
Reviewed-by: Tomaž Vajngerl <quikee@gmail.com>
