Insert trigger function: If query affects no rows then return `null`
Insert trigger function is modified to have
`IF r IS NULL THEN RETURN null; ELSE RETURN r; END IF;` in return statement.
Changes `consoleMode` variable templated by HGE to `server` and modified console to respect in the same way and adds a patch to continue working with the older HGEs
- [x] Server
- [x] Console
