categorize cronjob on cronjob-overview

Signed-off-by: Michael Kaufmann (d00p) <d00p@froxlor.org>
set version to 0.9.31 for upcoming release

Signed-off-by: Michael Kaufmann (d00p) <d00p@froxlor.org>
Merge remote-tracking branch 'origin/0.9.31'
Merge branch 'master' of github.com:Froxlor/Froxlor
complete migration to new Settings class, fixes #1325

Signed-off-by: Michael Kaufmann (d00p) <d00p@froxlor.org>