GeezerVison

The row loader appends a LIMIT/OFFSET clause to a query to load its rows in
chunks. SQLite does not accept a LIMIT clause directly after a VALUES clause,
so a statement like "VALUES (3),(1),(2)" could not be prepared and showed
0 rows without reporting any error. Use such a statement as a sub-query
("SELECT * FROM (VALUES ...) LIMIT n OFFSET m") instead, which keeps the lazy
population. Queries which already contain a LIMIT clause or a compound
operator and all other queries are loaded exactly as before.

Add test-row-loader which runs queries through SqliteTableModel and checks the
loaded rows, the row count and the statements which are used for the other
kinds of queries.