Images not being indexed on save

Regression caused by 06a5be9d

This is a pretty serious issue as no images uploaded since November 19th (when this went live) have been indexed. We will need to prepare an sync script to go over all activity posts since then and reindex. @xander-miller please add this check to your smoke tests.

Steps to replicate

1. Upload an image
2. Go to images filter on channel feed
3. Image not visible
4. Go to image full view (/media/10...) via modal/activity
5. Edit
6. Index still not triggered

Solution

Removing the newly introduced __sleep function resolved.