Description of problem:
The $server/RHEL/(Vendor) filter does not work. Clicking on the checkbox for Red Hat Enterprise Linux reloads the page but still displays all items and does not remove the other products from the sidebar.

Version-Release number of selected component (if applicable):
dev

How reproducible:
Easy always

Steps to Reproduce:
1. Click on a well populated vendor on the homepage, e.g. Dell
2. Click the Red Hat Enterprise Linux checkbox in the left sidebar

Actual results:
All items are displayed

Expected results:
The RHOS and MRG items should be hidden, as well as the RHOS/MRG sidebar boxes

Additional info:
It works the other way around, i.e. clicking Red Hat OpenStack will remove all MRG and RHEL entries. Clicking on a RHEL version appears to work (e.g clicking the RHEL version 5 checkbox will remove all other entries != RHEL5)