fdo#54361 - FILEOPEN: Chart background in XLSX is transparent instead of white
  
Change-Id: I2b932c9f09a010a4f999707fb6299c392a89550a
Reviewed-on: https://gerrit.libreoffice.org/9806
Reviewed-by: Muthu Subramanian K <muthusuba@gmail.com>
Tested-by: Muthu Subramanian K <muthusuba@gmail.com>