Issue 3207: CSS properties in the "Computed" tab are not updated correctly

Steps to reproduce

  1. Open Firebug
  2. Switch to the HTML panel
  3. Inspect the blue <div> above (#element1)
  4. Switch to the Computed side panel "Trebuchet MS",Helvetica,sans-serif should be shown for the font-family property
  5. Switch to the Style side panel
  6. Right-click into the #element1 rule and choose New Property... from the context menu
  7. Add font-family as property and Georgia as value
  8. Switch back to the Computed side panel

Expected result