odd behaviour with namedDictionary and/or SLList

Still under investigation - @Mattijs noticed that valgrind + topoSet was indicating some memory issues. v2012 is fine, v2106 and v2112 exhibit this problem. The main change between these versions is the handling of the topoSet entries. There were previously a PtrList of entry, which meant that naming the action (looks like a dictionary) would not work - the reading would grab the entire content as a dictionary instead.

The problem seems to lie either with some assignment problems with namedDictionary itself, or slicing of the SLList types. Changing the List to an SLList in the topoSet application seems to indicate it might be the latter.

Testing on simpleFoam/pipeCyclic

Will investigate after the v2112 release.