gtktiledviewer: Fill whole statusbar with progressbar
gtktiledviewer: Fill whole statusbar with progressbar

We don't have anything yet to put in statusbar. Let progressbar
fill the whole width of statusbar for now.

Change-Id: I4cd8745e997a0d2b917bc5baf358b097174d0df9

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