Fix Anchors.ConditionalClear

The wrong arguments were being passed to the strategy, effectively
rendering all conditionals as noops.
Be less aggressive in checking for a Frame-like object
minor debug
Make these regexes work in 5.1 as well as 5.2
Frames.IsRegion is a bit less aggressive in checking for Frame-like objects

This is a relatively insufficient test for a frame, but really, we should
use more specialized functions, rather than trying to verify things that
aren't necessary in actual use.