Add default SLA to org UI

org-default-sla-hand - patch from pre-split branch org-default-sla
org-default-sla-hand - parents around args

org-default-sla-hand - base minitest added

org-default-sla-hand - removed empty setup
Merge pull request #2117 from thomasmckay/org-default-sla-hand

Add default SLA to org UI