sc tiled editing: Small refactor, preparing for moving cell selections.
sc tiled editing: Small refactor, preparing for moving cell selections.

Change-Id: I61e98357a4d7248bd805907c8b37c94900259297

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