Fix double search results in shared asset searches

Steps to Reproduce:

• As Administrator, create another user and add to Members group.
• Still as Administrator, click on the asset search from the left menu.
• Create the following search:
  • Picture
  • image/png
  • Width Between 500 px and 1,500 px
  • Height Between 500 px and 1,500 px

=> On nightly.nuxeo.com, this search should return 3 results.

• Save the search as "My test search".
• Share the search with the previously created user.
• Log out, then log in as the previously created user.
• Go to Asset search and select the search saved earlier.

=> Search returns 3 results, but the display shows 6 (each result is doubled).

Workaround:

• Switching to list view, then back corrects the display... however if you log out and log back in again, then go to the saved search, the doubled results reappear.