Revert [30032] so appropriate PHP warnings aren't masked.

Fixes #28743

Built from https://develop.svn.wordpress.org/trunk@30592


git-svn-id: http://core.svn.wordpress.org/trunk@30582 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Editor: use the Alt+Shift+W keyboard shortcut for new DFW from both the Visual and Text editors. Props afercia, fixes #30450.
Built from https://develop.svn.wordpress.org/trunk@30593


git-svn-id: http://core.svn.wordpress.org/trunk@30583 1a063a9b-81f0-0310-95a4-ce76da25c4cd