private void ReorderTransitStates()
{
// Where the list contains 1, 2, 3 and 2 is removed, the positions should reorder to 1, 2.
var orderedStates = TransitStates.OrderBy(ts => ts.OrdinalPosition).ToList();
for (int i = 0; i < orderedStates.Count; i++)
{
orderedStates[i].OrdinalPosition = i + 1;
}
TransitStates = orderedStates;
}