plots: add identity _fullInput refs to fullTrace

  in non-transformed traces, for consistency with transformed traces

Author: etpinard

src/plots/plots.js

@@ -642,6 +642,11 @@ plots.supplyDataDefaults = function(dataIn, dataOut, layout, fullLayout) {
             }
         }
         else {
+
+            // add identify refs for consistency with transformed traces
+            fullTrace._fullInput = fullTrace;
+            fullTrace._expandedInput = fullTrace;
+
             pushModule(fullTrace);
         }
     }