Hide "Previously uploaded" and "Suggested" when list is empty

[ocean90]

It seems like this issue was introduced in 4.6.

• Go to the header image control in the customizer
• Make sure that you're customizing a theme with custom header support
• Notice the "Previously uploaded" and "Suggested" headlines without a list of images

[ocean90]

trunk/src/wp-includes/js/customize-views.js?rev=36639&marks=196#L173: $.prev() doesn't contain .customize-control-title anymore, it's now div.customize-control-notifications-container.

[Fencer04]

Hide headers when suggested or default header images aren't available.

[Fencer04]

I added a patch that updates the selector for the header text based on the new notification div that is between the list and the title of the list.

[Fencer04]

New version of patch created from the root for easier installation.

[westonruter]

#38561 was marked as a duplicate.

[westonruter]

Duplicate of #38561.

I got my duplicates confused. Fixed in [39145].