factlist parsing is much too slow

[Broes De Cat]

See attached files

[Broes De Cat]

Fixes #583: Autocomplete on a sort's parents was called |table| times instead of just once.

→ <<cset 23f3f2146c81>>

[Bart Bogaerts]

Merged in parsing_subtype_speed_fix (pull request #148)

Fixes #583: Autocomplete on a sort's parents was called |table| times instead of just once.

→ <<cset 259cd4def428>>