Update thumbnails after importing templates to a folder.
Update thumbnails after importing templates to a folder.

Change-Id: I44afb92c27b58de3206a90b7aad4125d6860d6ba

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