Feature Request: option to display diff before updating an egg.

[nmistry]

As an administrator, I need to understand and validate the updates to an egg prior to installing the update. The panel can provide a mechanism, to display a diff of the current and proposed changes prior to accepting the egg updates requesting the user to confirm. Obviously this can be overridden in global settings or bypassed if using bulk actions. This is a time saver because eggs may come from different repos/sources and tracking down the diff, while pedestrian, creates extra steps that can be automated.