sc tiled editing: Better setup of drawinglayer, so that images are swapped in.
sc tiled editing: Better setup of drawinglayer, so that images are swapped in.

Change-Id: I6f28ab1e4af91b12005ddfb9e64e984c783081ff

JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core