Replace the transient Data Analytics tree label with a real
RimDataAnalyticsCollection object that owns the case-level fault distance
collection and the well target mappings. The folder shows its analytics
objects flattened and exposes a right-click menu to create a new Fault
Distance and a new Well Target Mapping.
Migrate case-level well target mappings from older project files into the
new collection via initAfterRead; fault distance is unreleased and needs
no migration. The case accessors faultDistanceCollection() and
addWellTargetMapping() now forward to the new object, and the creation
features resolve a selected Data Analytics folder.
