SqlQueryPage: added storedProcsTab.displayed to 'at' list, to hopefully
solve very occasional problem with Stored Procs visibility; and removed
obsolete comment.
SqlQueryTest: trivial, just added a space (to debug print for error).
sqlQueries.txt: modified SelectBadColumn test, to use a legitimate table
name (partitioned_table), so as to actually test for a bad column name;
and added two tests (SysUpsert1, SysUpsert2) of
PARTITIONED_TABLE.upsert, which is a relatively new CRUD proc, added
along with UPSERT queries (one test inserts, the other updates).