Fix for bug where displaying WaypointList after adding offline waypoints...

Fix for bug where displaying WaypointList after adding offline waypoints resulted in an empty waypoint list, until the next waypoint was manually added

src/ui/WaypointList.cc

@@ -122,6 +122,11 @@ WaypointList::WaypointList(QWidget *parent, UASWaypointManager* wpm) :
         connect(WPM, SIGNAL(waypointViewOnlyListChanged(void)),                  this, SLOT(waypointViewOnlyListChanged(void)));
         connect(WPM, SIGNAL(waypointViewOnlyChanged(int,Waypoint*)), this, SLOT(updateWaypointViewOnly(int,Waypoint*)));
         connect(WPM, SIGNAL(currentWaypointChanged(quint16)),            this, SLOT(currentWaypointViewOnlyChanged(quint16)));
+
+        //Even if there are no waypoints, since this is a new instance and there is an
+        //existing WPM, then we need to assume things have changed, and act appropriatly.
+        waypointEditableListChanged();
+        waypointViewOnlyListChanged();
     }
 
     // STATUS LABEL