* 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
* Remove obsolete template commands
Use first object in object list when creating plots for templates and a case is selected. (use first well in well list, first group in group list, ...)
* Always create the reference string
