W'bal and Derived refresh

.. during mass update, not just on data change.

src/RideFile.h

@@ -121,6 +121,7 @@ class RideFile : public QObject // QObject to emit signals
 
         friend class RideFileCommand; // tells us we were modified
         friend class RideCache; // tells us if wbal is stale
+        friend class RideItem; // derived/wbal stale
         friend class MainWindow; // tells us we were modified
         friend class Context; // tells us we were saved
 

src/RideItem.cpp

@@ -204,11 +204,15 @@ RideItem::notifyRideDataChanged()
     isstale=true;
 
     // force a recompute of derived data series
-    if (ride_) ride_->recalculateDerivedSeries(true);
+    if (ride_) {
+        ride_->wstale = true;
+        ride_->recalculateDerivedSeries(true);
+    }
 
     // refresh the cache
     if (fileCache_) fileCache_->refresh(ride());
 
+
     // refresh the data
     refresh();
 
@@ -448,6 +452,11 @@ RideItem::refresh()
         // close if we opened it
         if (doclose) {
             close();
+        } else {
+
+            // if it is open then recompute
+            ride_->wstale = true;
+            ride_->recalculateDerivedSeries(true);
         }
 
     } else {