The case-level Data Filters node (RimDataFilterCollection) was always shown under
RimEclipseCase, cluttering the tree when empty. Gate it in
RimEclipseCase::defineUiTreeOrdering on a new shouldBeVisibleInTree() check, and
refresh the owner case from onItemsChanged/onChildDeleted so the node appears and
disappears as the collection crosses the empty boundary.
Because a hidden node cannot be right-clicked to create the first filter, add a
RimEclipseCase::appendMenuItems override that exposes the filter-creation
commands as a Filters submenu on the case node. A shared
RicCellFilterFeatureTools::selectedDataFilterCollection() resolves a selected
RimEclipseCase to its data filter collection, so the cell, property and combined
filter create features target the case-level collection.
Kristian Bendiksen
e37b20afb1