added deleted state for backer [#49928199]
Admin can delete a backer via adm/backers [#49928199]
We don't show deleted backers on adm/backers [#49928199]
Update backers by period view to don't show the deleted backers in chart [#49928199]
Cron job to move tha backers that is in pending more that 6 days after created [Fix #49928199]