moved admin_notification to sveawebpay_common.php
refactored _doStatusUpdate, broke out updateOrdersStatus, getSveaOrderId
WEB-273 finished
WEB-274 finished
WEB-275, WEB-276
ported admin settings to partpay
WIP straight ported rest of invoice order admin flow to partpay
WEB-277 partpayment order status admin and autodeliver working
Merge branch 'feature/WEB-272_delivered_implies_svea_delivered' into develop
Removed Svea admin buttons and hook into admin_notification() in favour of setting order status via built-in change order status procedure.
merge