Issue: Timestamp for blog-posts

Implemented in 4.2.x. You can set custom times for the following:
- Pages (can be reordered later by updating the timestamp of the first edit)
- Feeds (can be reordered later)
- Feed Entries' published time (can be reordered later). Note that other timestamps for feed entries (create, etc) are inherited from the linked content, so a custom time on the content would affect the other feed-entry timestamps you see.
- Edits (can be reordered later, but does not change which edit edited each other. This may lead to unexpected history summaries)
- Attachment Updates (can be reordered later)
- Category Listings (if added through a page's editor, the listings are effective at the same time as that edit; otherwise follows the same rules as below
- Book Chapters, Team Content, Translations (only if linked to the parent at the page's creation time - like Write New Chapter button - then inherits the page's creation time)
- Discussions
- Comments (reordering before discussion start will change the discussion start time too)

Cool!