Adaptions to UI, added more modes what the user
can do in SafeMode. Adapted locations to write
pack information and added places where to enter
SafeMode. Implemented basically all five
possible user choices

Change-Id: Ic5324a8f77ab434309e840949c3803e65a75c538
Reviewed-on: https://gerrit.libreoffice.org/29785Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Armin Le Grand <Armin.Le.Grand@cib.de>