Allow user to specify Accumulated or Rate for a summary curve. Default setting is Auto, and summary address is used to derive Accumulated/Rate. User can set curve type explicitly.
* Use one common variable for object name, use three ints
* Move enums to separate file
* Refactor use of enums
* Move implementation to cpp
* Refactor includes
* Update icons for summary and ensemble templates
* Icons for regression and decline
* #10374 LineEditor: Hide the placeholder widget when not used
* #10376 Assign a case ID to delta summary case
* Do not show decline range text in plot