#8370: Address review comments

Keep original additional summary files on Save As, reject cases combined with ensembles, keep unrestored additional file mappings, support growing file sets, update short names on ensemble import, simplify aggregator and example.

ApplicationLibCode/FileInterface/RifSummaryReaderAggregator.cpp

@@ -52,9 +52,11 @@ std::pair<bool, std::vector<double>> RifSummaryReaderAggregator::values( const R
     {
         auto [isOk, readerValues] = reader->values( resultAddress );
 
-        if ( !readerValues.empty() ) anyReaderHasValues = true;
-
-        if ( readerValues.empty() )
+        if ( !readerValues.empty() )
+        {
+            anyReaderHasValues = true;
+        }
+        else
         {
             // When a well is introduced, no data is present before the time step the well is introduced
             // Add values of zero for this interval