Revert "Cleanup: Conditional access qualifier expression is known to be not null. WTI-1767"This reverts commit c4b24c0a4946d7cd20c0fb302aa9c8e30f10afc6.
Adjusted the failure mechanism section calculator stub:- Split the assembly categories input in a version for the detailed and for the tailor made assessment to prevent confusion.WTI-1842
Adjusted the failure mechanism section calculator stub:- Introduced property to keep track of the assembly categories input which was used for the manual assemblyWTI-1842
