Settlements: add support for setting the 'version' attribute

[toconnell]

Also needs a re-baselining to change 'rules_set' to version

[toconnell]

This is live in production in 1.35.248, but needs some touching up:

• [x] the event log type needs to be the purple/admin type
• [ ] the event log itself needs a max width on desktop

[toconnell]

Moved the event log width thing over to this ticket: https://github.com/toconnell/kdm-manager/issues/563

Closing this out; the sysadmin log thing is in the next release of the API.