Cleaned DAMEnumerations.cs as far as possible for now. Moving RWScenario options not done as these have to be removed as stated in MWDAM-1410.Related to Issue [MWDAM-1282]
Made sure HeadPl3 and HeadPl4 for scenario's are only used when they actually contain a value. So from now on, when HeadPl3 (and/or HeadPl4) are NOT defined in the scenarios.csv, it stays nil. For the Design calculations, this means that the location.HeadPl3 is used when scenario.HeadPl3 = nil. Related to Issue [MWDAM-1406]