As far as I know there is no way to bulk edit anything at the track level.

However, you can bulk edit album info:

1. Select 'Entire collection' in the left pane
2. Right click the right pane, and select Table (View) - as opposed to Thumbnail View
3. Then select the albums you want to edit by clicking each album while holding down either the Shift or Ctrl key.
4. Finally right click, and select Properties
5. Now you can bulk edit any album property (except for track info)