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/RimEmCase.h

@@ -46,7 +46,6 @@ public:
     ~RimEmCase() override;
 
     bool openEclipseGridFile() override;
-    void reloadEclipseGridFile() override;
 
     QString locationOnDisc() const override;