MS Sites List Table: Pagination broken when entering a page number

[jeremyfelt]

When wp-admin/network/sites.php shows a list table with more than one page, it is not possible to manually enter a page number go directly to a page. Pagination via prev/next arrows works fine.

This appears to have been introduced in [17322] when AJAX was removed from list tables. I don't think other tables have this trouble. It seems that the handling for the allblogs action is getting in the way of a normal paged request.

[jeremyfelt]

We can used the same "paged" handling as wp-admin/network/users.php when an allblogs request happens without a matching action or action2. 32982.diff​ does this.

[jeremyfelt]

In 35917:

MS: Fix pagination in MS Sites List Table when entering a page number.

When a page number is manually entered in the sites list table and no bulk action is selected, add paged as a query argument to the redirect.

Fixes #32982.