I have a project where sitemanager have access to placing views in panels, but not access to views. Setting this up, I found that there was no option to expose the view mode for rendered entities to panels. Searching a bit showed that others have the same need, so I made a patch. Hopefully it can be of use to somebody else.
The logic of which list of view modes to show (what entity is listed) in the panel_pane is a bit flawed, as it depends on the base_table. Any suggestions of how to better do this would be greatly appreciated.
Patch coming up in first comment