Vid 1669

Removing details icon and attribution from article thumbnails in both VE and article view modes. 

Handles https://wikia-inc.atlassian.net/browse/VID-1669 and https://wikia-inc.atlassian.net/browse/VID-1674. 

@mklucsarits @inez @BladeBronson 

To do: 
- [ ] Fully test this in the case of adding a video via VE media insert dialog.