Issue 253: Make cron text parser remove spaces

The cron job dialog complained "bad syntax in fields" when I entered the following text: 0, 12

but worked with the following text: 0,12

If there’s some reason that you wouldn’t want to remove spaces, it would help to have some notice about this syntax requirement.

Strip space chars from crontool entries. Fixes issue #253

→ <<cset 7943d22d5354 > >