Fix for Selection nodes not remaining in sync with Document

Reviewers:
- [ ] @ikeough 
- [ ] @lukechurch 

Specifically, RequiresRecalc was getting set to true, which was triggering a re-execute, but was not causing the AST for the node to be re-executed due to a missing `ForceReExecuteOfNode = true`

Merge into:
- [ ] Revit2015