exec.query.max_rows QUERY-level options are shown on Profiles tab

As arina has noticed, option exec.query.max_rows is shown on Web UI's Profiles even when it was not set explicitly. The issue is because the option is being set on the query level internally.

From the code, looks like it is set in DrillSqlWorker.checkAndApplyAutoLimit(), and perhaps a check whether the value differs from the existing one should be added.