(ReviewsPeer): use a single SQL query in getHeisigProgressCount()
(ReviewsPeer): use a single SQL query in getHeisigProgressCount()

Probably not much performance impact, however it was sort of incorrect
as the second query would still have the COUNT(*) col from the first
query.

kanji-koohii/kanji-koohii,kanji-koohii/kanji-koohii,fabd/kanji-koohii,kanji-koohii/kanji-koohii,fabd/kanji-koohii,kanji-koohii/kanji-koohii,fabd/kanji-koohii,fabd/kanji-koohii,fabd/kanji-koohii,fabd/kanji-koohii,kanji-koohii/kanji-koohii