Refactor FaultTreeAndSystemOverviewTable and FaultTreeAndSystemOverviewCardsList

[blcham]

          This is quite a strange class to me. (CC @Kasmadei )

The entire class seems to me like having basically no shared code for faultTreeTable and systemTable, but still it shares one file and this very weird name.

I suggest rethinking this design, possibly moving ftaTreeOverview and systemOverview functionality to separate subclasses and possibly renaming this class something like "OverviewTable" if there is something that can be shared ...

The same goes to FaultTreeAndSystemOverviewCardsList.

Originally posted by @blcham in #405 (comment)

[blcham]

Currently low priority task.