Custom value for "Top Clients" (Total & Blocked) via Web interface

It would be really great to be able to set value (# of) for "Top Clients" ( both Total & Blocked) via Web-GUI.
That could be either selectable via 3-4 predefined values (10, 25, 50) or "scroll wheel" (1-99).

This way breaking updates could be avoided and values be preserved even on major updates.