Bug 31477: Use clipboard icon for inventory

Bug 31477: Use clipboard icon for inventory

This patch changes the inventory icon on the cataloging home page. The
"chart" icon is switched for one of a clipboard with a checkmark.

To test, apply the patch and go to the cataloging home page in the staff
interface. Check that the icon on the inventory link looks correct.

Signed-off-by: Lucas Gass <lucas@bywatersolutions.com>
Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>