yep : clicking X per page button bizillion times (while your screen resolution allow alot more then 10 rows ) gets very old quickly 

I am on Omada SDN Controller v5.0.30 and have seen no differences regarding saving preferences.

It seems very useful to me that there will be a possibility to save these kind of preferences under the controller settings or as an alternative, that the last used settings are saved, e.g. in the browser cookie. Even a refresh of the browser already causes my 100/page to fall back to 10/page. The lack of this kind of simple user settings detracts from an otherwise nice product.