gtktiledviewer: invoke lok::Office::postKeyEvent() on key press / release
gtktiledviewer: invoke lok::Office::postKeyEvent() on key press / release

Change-Id: I82587fb48f5b7d037d66c0eb0e4aa1c7cee8702a

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