Channel Manager logs warning about fontawesome-webfont.woff

Each time the 'edit menu' button is clicked, a warning about fontawesome-webfont.woff is logged.

Steps to reproduce:
1. start the page-management archetype:
https://svn.onehippo.org/repos/hippo/hippo-cms7/archetypes/branches/archetypes-page-management

2. open the only channel
3. click 'Edit channel'
4. click 'Edit menu'

Expected: no warnings are logged
Actual: the following warning is logged:

WARN [org.onehippo.cms7.utilities.servlet.ResourceServlet.prepareResponse():428] No mime-type mapping for resource path: /home/mathijs/projects/hippo/page-mgmt/channel-manager/frontend/target/classes/angular/components/font-awesome/fonts/fontawesome-webfont.woff. Fallback to 'application/octet-stream'.