SF: More frontend fixes

- Crop mirrored layers with the mirror root. Previously we were
 cropping the layers with the original layer and not the clone.
- Explicitly make unreachable nodes invisible. Fixes an issue where
we accessed stale snapshots that were no longer reachable.
- Update buffer geometry (inverseTransformDisplay) when display state
changes.
- Blur fixes.

Test: presubmit
Bug: 238781169

Change-Id: I6f88f2456c3fd15c9d819ec2272aee639badcd19