* there was already ITimestampWithOffsetBased for objects
* this creates the container version
* functions to add objects (parts/situations) and guarantee the sort order
* moved push_frontMaxElements to CSequence (not specific for timestamp lists)
* added in-place reverse
* support of property index
* used support classes BlackMisc::ITimestampBased, ITimestampObjectList and ICallsignObjectList
* fixed some issues in related aircraft situation class in same step