Don't do the annoying restart thing when sandboxed on OS X, ignore risks...

So far we have just displayed a hugely annoying dialog "sorry, but we
suck, you need to start LibreOffice again". But that sucks. So just
try to do without restart then, and let's see what happens. At least
in trivial testing, no crash.

Change-Id: I475fe49a0fdb8086bb33a165a08b32ac46548857