Minor: clean up anchor propagation
- Anchors don't need to be propagated completely to all glyphs, i.e.
ocircumflexhookaboveprobably doesn't need all the stuff it inherits from
o. Reduces file size.
bottomanchor to attach the hook for
dje-cy, but it is treated as an OpenType Layout anchor, which it shouldn't. Glyphs.app allows this by prefixing anchor names with e.g.
#, needs handling in ufo2ft.