Move the "last edited at" text and saved/updated/published notices in post/page editor

[jane]

1. The timestamp of the last save is currently displayed at the bottom right of the editor box. It would make more sense for this information to be tied to the Publish box instead.

2. The yellow alert boxes that appear at the top of the page are weird. a) They should appear closer to the button that caused the action (general usability/accessibility best practice), so probably by the Publish box. b) Once you edit anything on the screen, the "post updated" (or saved, etc) text should go away, because it is no longer current.

Am thinking we could combine these two things into one flexible status message that's located in or adjacent to the Publish box.

[scribu]

Related: #17906

[rhyswynne]

patch.diff produced a notice error. Fixed by using $post->ID rather than $post_ID. Probably needs some UI work.

[melchoyce]

6 years old, but still very relevant — and things to keep in mind for Gutenberg. :)

I imagine at this point those patches are out of date. Points 1 and 2a could use some UI design. 2b should probably be a separate ticket at this point.

[garusky]

A few weeks ago we discussed in the design channel on this old ticket. We agreed that adjusting the classic editor at this point is something we can avoid and focus on Gutenberg.
However, I wanted to analyze better the point 2 and on the user experience side I would like to add that:

1. Moving the notification messages near the publish box would be negative on mobile because when the page is reloaded, the page itself scroll to the top and they will not be seen anymore.
2. Some texts of the notifications are very long (for example that of the revisions) and they would be difficult to lay out in the small publish box.

For these reasons I suggest closing this task for points 1. and 2a.

As suggested by @melchoyce I opened a separate ticket #44626 for point 2b.