Bug 37745: (bug 35402 follow-up) Fix "Rows per page" dropdown items

Bug 37745: (bug 35402 follow-up) Fix "Rows per page" dropdown items

There were 2 class attributes.

Test plan:
Create a new report and run it
Use the "Rows per page" dropdown to select another value
=> Without this patch nothing happens
=> With this patch applied the page is reloaded and the correct number
of rows is displayed

Signed-off-by: Roman Dolny <roman.dolny@jezuici.pl>
Signed-off-by: Lucas Gass <lucas@bywatersolutions.com>
Signed-off-by: Owen Leonard <oleonard@myacpl.org>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>