Bulk Edit -> Publish should publish scheduled posts

[siobhan]

Here's the flow that I was working through:

1. Scheduled about 15 posts to be published on the site at a later date.
2. Decided I wanted to just publish them now.
3. Used Bulk Edit to change the status of all of the posts to published. Saved
4. Went about my business thinking they were published
5. Later visited the site and they weren't published.

6 Went back into the posts and they're still marked as scheduled.

7. Had to manually go in and change the date on each post to get them published.

This was really, really annoying. Especially since, as I was able to take the action of Bulk Edit -> change status to published, I thought that what I had done had worked. There was no indication that it hadn't.

This could be solved in a number of ways:

1. If a user bulk edits and selects publish, the date on the post is changed to the current date and time and the posts are published as expected.

2. If posts are scheduled and the user selects them to bulk edit, there is no option to change the status to published.

3. If the user takes the action of trying to change the status of scheduled posts to published, the message is changed from "# Posts Updated" to "Scheduled posts have not been published."

[Clorith]

Changing the ticket type of this to a bug, as the behavior is as expected (published a scheduled post) in the quick edit as well, which is essentially bulk-edit for a singular post