Manually entered v. imported fuel types

When we enter a fuel type in Vessels manually, we must select from the Fuel/Lube Types table in Data Centre. However, when we import a vessel from Q88 the type does not have to be in the table and we will have to remember to delete the fuel types that are not wanted or required. If forgotten, it will stop users from opening voyages for that vessel. And we would prefer not to have to rely on remembering manual work-arounds. For further reference, please see VS-181722.