message: Move tubeStart to member variable section of header
diff: @@ -114,7 +114,6 @@ private:
  void placeStructure();
  void placeTubes();
  - NAS2D::Rectangle<int> tubeStart;
  void placeTubeStart();
  void placeTubeEnd();
  @@ -261,6 +260,8 @@ private:
  int mResidentialCapacity = 0;
  + NAS2D::Rectangle<int> tubeStart;
  +
  bool mLeftButtonDown = false;
  bool mLoadingExisting = false;
  bool mPinResourcePanel = false;
  