Job level defaults

[voneiden]

While each job needs to be configurable independently, job should have the ability to provide defaults to all ops (SetupSheet)

• [x] CoolantMode
• [x] CoolantModes (?)
• [x] FinalDepthExpression
• [x] StartDepthExpression
• [x] StepDownExpression
• [x] ClearanceHeightExpression
• [x] ClearanceHeightOffset
• [x] SafeHeightExpression
• [x] SafeHeightOffset