Fixed a crash-on-exit, when the validation message is up when closing.
Fixed a crash-on-exit, when the validation message is up when closing.

Delete the hint window instnce before the grid windows get deleted,
since the hint window is now a child window of one of the grid
window instances.

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