public void setRowsPerPage(String pageName, int newValue) {
        setPageProperty(pageName, "console.rows_per_page", newValue);
    }
Sets the new number of rows per page for the specified page for the current logged user.
The rows per page value is stored as a user property. The same property is being used for
different pages. The encoding format is the following "pageName1=value,pageName2=value".

@param pageName the name of the page to stored its new value.
@param newValue the new rows per page value.
xmppserver/src/main/java/org/jivesoftware/util/WebManager.java