contact-store: fix is-public being set to false on frontend
==
::
++ handle-initial
- |= [rolo=rolodex:store is-public=?]
+ |= [rolo=rolodex:store *]
^- (quip card _state)
=/ our-contact (~(got by rolodex) our.bowl)
=/ diff-rolo=rolodex:store
