Media dialog selection info is no longer visible

[afercia]

This appears to be a regression on trunk. Marking as such.

In the media dialog, when multiple selection is allowed, for example when inserting a gallery block, the media dialog shows small thumbnail preview of the selected media in the bottom toolbar.

These are the selection-info and selection-view containers in the markup.

They are no longer visible on trunk, though the markup is there.

After some quick inspection, I couldn't find relevant changes in the related CSS, although I may be missing something. I'd suggest to double check any change in the related markup first.

In the responsive view, the bug does not occurr. Note that in the responsive view, the bottom toolbar only shows some summary information e.g.: '6 items seleccted' plus a 'Clear' button.

See attached screenshots.

[afercia]

Media selection not visible on trunk.

[afercia]

Media selection visible on WP 7.0.

[afercia]

Media selection visible on trunk, responsive view.

Trac ticket: https://core.trac.wordpress.org/ticket/65767

This behavior was originally introduced in https://core.trac.wordpress.org/ticket/65275. Could you verify that this change doesn't inadvertently reintroduce the issue that ticket was intended to fix?

Verified against the #65275 test instructions. The change scopes position: relative to .attachments-browser .media-toolbar-secondary, which still contains the filter spinner, so the #65275 positioning behavior is preserved.

@Sukhendu2002 thank you for the PR. Makes sense.
No worries for the spinner position, it needs to be addressed anyways as there's a few issues with it and it's tracked in https://core.trac.wordpress.org/ticket/65778

[afercia]

In 62962:

Media: Restore selection previews in the Media dialog bottom toolbar.

Developed in ​https://github.com/WordPress/wordpress-develop/pull/12784

Props sukhendu2002, mukesh27, iqbal1hossain, afercia.
Fixes #65767.

[joedolson]

#65886 was marked as a duplicate.