New Media: Image isn't auto-selected after uploading featured image

[johnbillion]

Steps to reproduce:

• From a post editing screen, click 'Set featured image'.
• Switch to the 'Upload Files' tab and upload a new image.

Note that the newly upload file isn't automatically selected, leaving the user to scratch their head for a few moments before clicking their newly uploaded image.

Caveat: You can actually upload multiple images in this step. Ideally, this should be disallowed here. Maybe a future enhancement, though.

I don't know if multiple images needs to be disallowed. They're still getting uploaded to the media library. We could select the first one, or decline to select any when multiple are uploaded at once.

22817.diff​ auto selects the file when uploaded from "set featured image", and selects only the first image in the UI when multiple are uploaded.

this patch corrected the issue for me - verified that uploaded image is now auto-selected in featured image uploader, first image is selected when a group is uploaded;

Just tested this patch and it worked as expected. :)

In 23259:

Media: Automatically select uploading attachments in single-select workflows.

The code now automatically selects uploading attachments in all workflows. In a workflow that selects multiple attachments, all attachments added to the upload queue are selected. In a workflow that selects a single attachment (e.g. selecting a featured image), the last attachment added to the upload queue is selected.

see #22817.

In 23270:

Media: Automatically select uploading attachments in single-select workflows.

The code now automatically selects uploading attachments in all workflows. In a workflow that selects multiple attachments, all attachments added to the upload queue are selected. In a workflow that selects a single attachment (e.g. selecting a featured image), the last attachment added to the upload queue is selected.

Merges [23259] to the 3.5 branch.

props koopersmith.
fixes #22817.