message: When dragging to create a new atom, use starting coords
  Fixes as suggested by
diff: @@ -550,7 +550,7 @@ void Editor::atomLeftDrag(QMouseEvent* e)
  if (!m_newObject.isValid()) {
  // Add a new atom bonded to the clicked atom
  RWAtom clickedAtom = m_molecule->atom(m_clickedObject.index);
  - newAtom = m_molecule->addAtom(m_toolWidget->atomicNumber());
  + newAtom = m_molecule->addAtom(m_toolWidget->atomicNumber(), clickedAtom.position3d());
  // Handle the automatic bond order
  int bondOrder = m_toolWidget->bondOrder();
  