Display max memory size is not respected if repr_rows < min_rows

[timsaucer]

Describe the bug

Our default values of repr_rows is 10 and min_rows is 20. This causes the clause rows_so_far < min_rows to never return False

To Reproduce

Print any large dataframe (>2 Mb). The entire frame is collected, even if it is not shown.

Expected behavior

Stop the stream when the memory limit is reached.

Additional context

It seems like min_rows should always be <= repr_rows. Maybe we should call it max_rows instead of repr_rows? The documentation also states "If you want a specific number of rows, set min_rows == max_rows."

[timsaucer]

FYI @kosiew