message: Reset ResearchTracker when loading savegame
diff: @@ -201,6 +201,7 @@ void MapViewState::load(const std::string& filePath)
  const auto idToRobotMap = readRobots(root->firstChildElement("robots"));
  readStructures(root->firstChildElement("structures"), idToRobotMap);
  + mResearchTracker.clear();
  readResearch(root->firstChildElement("research"), mResearchTracker);
  mResourceBreakdownPanel.previousResources() = readResources(root->firstChildElement("prev_resources"));
  