[RFE] Allow to set a custom number of rows per page for the tables

[joaquimrocha]

Current situation

We allow up to 50 rows per page in tables, but as reported by #522 , maybe we should have a way to customize the number of rows.

Impact

Users may find our default choice of rows/page limiting.

Ideal future situation

I think that once we have a settings page, maybe we could have a setting to indicate the rows to be displayed as choices. Alternatively, maybe this could be a setting we don't expose in the UI but allow to change through an external config (like a silent config).

[joaquimrocha]

This will be a part of #16 . Design is coming soon.