Statistics Contourmap UI updates (#12060)

* Enable time step selections and controls in view
* Support loading just what we need for statistics contour maps by using custom reader settings
* Close case once done with it unless there are active views.
* Add selection of user interface case (for result selection, display of wells, faults...)
* Avoid int overflow for nested progresses by using double
* Improve auto naming
* Misc. UI improvements

ApplicationLibCode/ProjectDataModel/Rim2dIntersectionView.cpp

@@ -455,7 +455,7 @@ size_t Rim2dIntersectionView::onTimeStepCountRequested()
 {
     if ( isTimeStepDependentDataVisible() && ownerCase() )
     {
-        return ownerCase()->timeStepStrings().size();
+        return timeStepStrings().size();
     }
 
     return 0;