#14022 DataFilter: Restore category options for case-level property filters on project load

The case-level RimDataFilterCollection lacked an equivalent of
RimEclipsePropertyFilterCollection::loadAndInitializePropertyFilters, so a
saved FORMATION_NAMES selection had its value preserved on reload but no
category options list to render against. The selection only appeared after
the user toggled the filter, which routes through fieldChangedByUi and
rebuilds the category cache. Add loadAndInitializeFilters and invoke it
from RimEclipseView::onLoadDataAndUpdate, once openReservoirCase has loaded
the grid and active formation names.

ApplicationLibCode/ProjectDataModel/CellFilters/RimDataFilterCollection.cpp

@@ -22,6 +22,7 @@
 #include "RimCellRangeFilter.h"
 #include "RimCombinedFilter.h"
 #include "RimEclipsePropertyFilter.h"
+#include "RimEclipseResultDefinition.h"
 
 #include "cafCmdFeatureMenuBuilder.h"
 #include "cafPdmFieldScriptingCapability.h"
@@ -125,6 +126,23 @@ bool RimDataFilterCollection::hasActiveFilters() const
     return false;
 }
 
+//--------------------------------------------------------------------------------------------------
+/// Populate per-filter caches that depend on case data (e.g. the formation-name category list for
+/// property filters). PDM's initAfterRead runs during XML deserialization, before the grid and
+/// formation names are loaded, so categories cannot be resolved there. Without this pass a saved
+/// FORMATION_NAMES selection has its value preserved but no options list to render against — the
+/// selection only appears after the user toggles the filter (which routes through fieldChangedByUi
+/// → computeResultValueRange). See OPM/ResInsight#14022.
+//--------------------------------------------------------------------------------------------------
+void RimDataFilterCollection::loadAndInitializeFilters()
+{
+    for ( auto* propertyFilter : descendantsIncludingThisOfType<RimEclipsePropertyFilter>() )
+    {
+        propertyFilter->resultDefinition()->loadResult();
+        propertyFilter->computeResultValueRange();
+    }
+}
+
 //--------------------------------------------------------------------------------------------------
 /// Hook from caf::PdmObjectCollection<T>: invoked after addItem / insertItem and on UI-driven
 /// changes to m_items. caf::Signal::connect silently skips a re-connect when the same observer

ApplicationLibCode/ProjectDataModel/CellFilters/RimDataFilterCollection.h

@@ -58,6 +58,8 @@ public:
 
     bool hasActiveFilters() const;
 
+    void loadAndInitializeFilters();
+
 protected:
     void onItemsChanged() override;
     void onChildDeleted( caf::PdmChildArrayFieldHandle* childArray, std::vector<caf::PdmObjectHandle*>& referringObjects ) override;

ApplicationLibCode/ProjectDataModel/RimEclipseView.cpp

@@ -1256,6 +1256,11 @@ void RimEclipseView::onLoadDataAndUpdate()
 
     m_propertyFilterCollection()->loadAndInitializePropertyFilters();
 
+    if ( auto* dataFilters = eclipseCase()->dataFilterCollection() )
+    {
+        dataFilters->loadAndInitializeFilters();
+    }
+
     faultCollection()->synchronizeFaults();
 
     m_wellCollection->scaleWellDisks();