* Do not create summary case group twice
* Fix memory leak of objects contained in childArrayFields
Use deleteAllChildObjects to delete objects instead of clear()
Rename collection function clear() -> deleteAllChildObjects
* Early exit for empty path
* Reduce redundant calls to refreshMetaData
* 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
Update the name of statistics surface when created
Regenerate surface geo only when required
Create statistics surfaces when importing surface ensemble
