Customer orders overview filter by status

Would be better if we did all the filtering client side, but I'm trying
to keep with the same style as the previous codebase.
expand arrow on left on admin payment config
INSTALL_URL constant expected a trailing slash
Submitted status for 'paid pending manual review'

Added a new invoice status "Submitted" for invoices where payment was
submitted but is not yet processed.  This is intended for manual
payments.
Fixed conf changes breaking autoinc every save
Orphan order expiration script

Not tested, but maybe someone will find it useful and test it for me
Don't show password on customer order view