Remove obsolete single summary template code
Always use maximized state of the QMdiSubWindow when a plot or view is deleted.
Move time axis to top
Set correct text for unused axis
Avoid assert when layout is requested for non existing legend
* 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
* Deprecate single summary plots and plot collections. Replace functionality using summary multi plots. Clean up some code. Fix crash when trying to normalize an empty curve
* #8425 Multi Graph : Support grouping on object name
* #8425 Multi Graph : Improve creation of new graphs
* #8425 Multi Graph : Improve default tick mark count
* Handle history and non history as identical headers
* #8425 Multi Graph : Increase space below a graph
