[BP Tools - Manage Optouts] A Blank Screen is the result when Bulk actions - Delete is applied when no opt-out entries have been selected

[emaralive]

There are 2 (two) ways to achieve a blank screen from site.url/wp-admin/tools.php?page=bp-optouts page/screen.

Scenario 1

There is at least 1 (one) opt-out entry:

1. Select Delete from Bulk actions dropdown menu.
2. Click apply without selecting an opt-out entry.

Scenario 2

In the event that there are no opt-out entries, using a query string with an empty optout_id and action set to delete will be sufficient for demonstration, for example:

site.url/wp-admin/tools.php?page=bp-optouts&optout_id=0&action=delete

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The result is a basically a blank screen, see screenshot - screenshot-win10-me-2024.06.10-17_09_54.png.

The patch fixes this issue by utilizing downstream code that provides a feedback message and a cancel button, see screenshot - screenshot-win10-me-2024.06.10-17_18_44.png.

[emaralive]

screenshot-win10-me-2024.06.10-17_09_54.png

[emaralive]

screenshot-win10-me-2024.06.10-17_18_44.png

[emaralive]

Initial patch

[imath]

Patch looks good to me, thanks for catching this issue. @dcavins can you have a look at it?

[imath]

In 13926:

Avoid the BP Opt-outs Admin screen to be empty

Props emaralive

Fixes #9180